{"title":"Pond Liners UK | All Types — HDPE, EPDM, Butyl, PVC \u0026 More","description":"\u003cdiv itemscope itemtype=\"https:\/\/schema.org\/CollectionPage\"\u003e\n\u003ch1 itemprop=\"name\"\u003ePond Liners UK — HDPE, EPDM, Butyl, PVC \u0026amp; More\u003c\/h1\u003e\n\n\u003cp itemprop=\"description\"\u003eThe UK's most comprehensive range of \u003cstrong\u003epond liners\u003c\/strong\u003e — buy HDPE, EPDM rubber, butyl, PVC, LDPE and Polyex pond liners online with free UK delivery. All pond liners are fish safe, UV resistant, and backed by guarantees from 15 to 40 years.\u003c\/p\u003e\n\n\u003cp\u003eWhether you need a \u003cstrong\u003epond liner for a small garden pond\u003c\/strong\u003e, a \u003cstrong\u003ekoi pond\u003c\/strong\u003e, a large \u003cstrong\u003efish pond\u003c\/strong\u003e, or an \u003cstrong\u003eindustrial reservoir\u003c\/strong\u003e, our range covers every size and application. All liners are cut to your exact measurements — no standard sheet sizes, no waste.\u003c\/p\u003e\n\n\u003ch2\u003eTypes of Pond Liner Available\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHDPE Pond Liners\u003c\/strong\u003e — Rigid, puncture-resistant industrial grade. Best for commercial ponds, reservoirs \u0026amp; large koi ponds. 25–40 year guarantee.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEPDM Pond Liners\u003c\/strong\u003e — Flexible fish-safe rubber liner. Best for wildlife ponds, irregular shapes \u0026amp; koi ponds. 25 year guarantee.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eButyl Rubber Pond Liners\u003c\/strong\u003e — Premium rubber liner, most flexible, longest lifespan. Lifetime guarantee.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePVC Pond Liners\u003c\/strong\u003e — Affordable \u0026amp; easy to install. Best for garden ponds \u0026amp; water features. 15–30 year guarantee.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLDPE Pond Liners\u003c\/strong\u003e — Budget-friendly, UV resistant, flexible. 15–40 year guarantee options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolyex Pond Liners\u003c\/strong\u003e — Reversible black\/brown, fish safe, excellent UV resistance. Lifetime guarantee.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Buy Your Pond Liner From Us?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Cut to size — any dimensions, no off-cuts or waste\u003c\/li\u003e\n\u003cli\u003e✅ Free underlay included on selected products\u003c\/li\u003e\n\u003cli\u003e✅ Free UK delivery on all orders\u003c\/li\u003e\n\u003cli\u003e✅ Guarantees from 15 to 40 years (lifetime on butyl \u0026amp; Polyex)\u003c\/li\u003e\n\u003cli\u003e✅ Fish safe and certified UV resistant\u003c\/li\u003e\n\u003cli\u003e✅ Expert advice — \u003ca href=\"\/pages\/get-expert-advice\"\u003efree consultation available\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eNot sure which pond liner to choose? Use our \u003ca href=\"\/pages\/pond-liner-size-coverage-guide\"\u003epond liner size calculator\u003c\/a\u003e or read our \u003ca href=\"\/pages\/epdm-vs-butyl-vs-pvc-vs-hdpe-vs-ldpe-complete-pond-liner-comparison-uk-2025\"\u003ecomplete pond liner comparison guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv itemscope itemtype=\"https:\/\/schema.org\/FAQPage\"\u003e\n\u003ch2\u003ePond Liner FAQ\u003c\/h2\u003e\n\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eWhat is the best pond liner to buy in the UK?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n\u003cp itemprop=\"text\"\u003eThe best pond liner depends on your pond type. EPDM rubber is the most popular for garden and koi ponds due to its flexibility and fish-safe certification. HDPE is best for large or commercial ponds. Butyl offers the longest lifespan with a lifetime guarantee. For budget ponds, LDPE or PVC are excellent value.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eHow do I calculate what size pond liner I need?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n\u003cp itemprop=\"text\"\u003eUse the formula: Length + (2 × depth) + 0.5m overlap = liner length. Width + (2 × depth) + 0.5m overlap = liner width. For example, a pond 3m long × 2m wide × 0.8m deep needs a liner approximately 5m × 4m. Use our free \u003ca href=\"\/pages\/pond-liner-size-coverage-guide\"\u003epond liner calculator\u003c\/a\u003e for an instant result.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eAre your pond liners fish safe?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n\u003cp itemprop=\"text\"\u003eYes — all our pond liners are fish safe. Our EPDM liners are manufactured to EPDM-45 standard, which is certified safe for fish and aquatic life. Our HDPE, PVC, and Butyl liners are also non-toxic and safe for koi, goldfish, and wildlife ponds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eHow long do pond liners last?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n\u003cp itemprop=\"text\"\u003ePond liner lifespan varies by type: PVC liners typically last 15–30 years, LDPE 15–40 years, HDPE 25–40 years, EPDM 25+ years, and Butyl and Polyex liners come with a lifetime guarantee. All our liners are UV stabilised to prevent degradation from sunlight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv itemscope itemprop=\"mainEntity\" itemtype=\"https:\/\/schema.org\/Question\"\u003e\n\u003ch3 itemprop=\"name\"\u003eDo you offer free delivery on pond liners?\u003c\/h3\u003e\n\u003cdiv itemscope itemprop=\"acceptedAnswer\" itemtype=\"https:\/\/schema.org\/Answer\"\u003e\n\u003cp itemprop=\"text\"\u003eYes — we offer free UK delivery on all pond liner orders. Most orders are dispatched within 1–3 working days. Large liners are delivered on a pallet. Custom-cut liners are made to order and typically dispatched within 2–5 working days.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","products":[{"product_id":"heavy-duty-hdpe-pond-liner-40year-guarantee-free-underlay-1","title":"HDPE Pond Liner | 40 Year Guarantee | Heavy Duty","description":"\u003ch2\u003eHDPE Pond Liner UK — Heavy Duty | UV Stabilised | Long Guarantee | Fish Safe | Free Delivery\u003c\/h2\u003e\n\u003cp\u003eFor large-scale pond projects, commercial water features, and installations requiring maximum UV stability and chemical resistance, our \u003cstrong\u003eHDPE Pond Liner\u003c\/strong\u003e is the professional's choice. High-Density Polyethylene is one of the world's most widely used liner materials for reservoirs, commercial ponds, and large water containment systems — and our HDPE pond liner brings that industrial-grade performance to UK garden and commercial pond installations.\u003c\/p\u003e\n\u003cp\u003eHDPE (High-Density Polyethylene) is engineered for long-term outdoor performance. Its inherent density creates exceptional resistance to UV radiation, chemical attack, and biological degradation — making it the preferred material for ponds where environmental exposure is extreme and liner replacement would be prohibitively expensive.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.35mm–1.0mm+ (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — UV stabilised with carbon black pigment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — food-grade polyethylene, certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e25–40 Years (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemical Resistance\u003c\/td\u003e\n\u003ctd\u003eOutstanding — resists acids, alkalis, oils\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eGood — less flexible than EPDM; best for regular shapes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack (UV-stable carbon black pigment)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for HDPE Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🏭 \u003cstrong\u003eCommercial Fish Farms\u003c\/strong\u003e — HDPE's food-grade certification makes it ideal for aquaculture and commercial fish production\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eLarge Agricultural Ponds\u003c\/strong\u003e — Irrigation reservoirs and livestock water storage where long-term chemical resistance is essential\u003c\/li\u003e\n\u003cli\u003e🌊 \u003cstrong\u003eCanal and Waterway Lining\u003c\/strong\u003e — Commercial waterway projects where HDPE's tensile strength and weldability are required\u003c\/li\u003e\n\u003cli\u003e🏗️ \u003cstrong\u003eFormal Concrete-Edged Ponds\u003c\/strong\u003e — HDPE's dimensional stability suits rectangular and regular-shaped formal ponds\u003c\/li\u003e\n\u003cli\u003e☀️ \u003cstrong\u003eHigh-UV Exposure Sites\u003c\/strong\u003e — Where continuous direct sunlight over decades is a factor — HDPE's UV stabilisation is industry-leading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare a smooth substrate\u003c\/strong\u003e — A compacted sand layer of 50–100mm provides the ideal base for HDPE installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderlay is essential\u003c\/strong\u003e — Lay 200gsm geotextile underlay before the HDPE liner to protect against stone punctures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition the HDPE\u003c\/strong\u003e — HDPE is heavier and less flexible — plan carefully before positioning. Large sheets may require additional labour\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeam welding for joins\u003c\/strong\u003e — Where multiple sheets are required, HDPE must be joined by hot-air or extrusion welding — a professional process\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnchor and backfill\u003c\/strong\u003e — HDPE edges are typically anchored in a concrete anchor trench or under concrete coping\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose HDPE?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndustry-leading UV stability via carbon-black pigmentation\u003c\/li\u003e\n\u003cli\u003eOutstanding chemical resistance — resists acids, alkalis, and oils\u003c\/li\u003e\n\u003cli\u003eDimensional stability — does not creep or deform under load\u003c\/li\u003e\n\u003cli\u003eWeldable — can be heat-welded into any shape for commercial projects\u003c\/li\u003e\n\u003cli\u003e25–40 year guarantees reflecting proven longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Food-grade polyethylene, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 25–40 Year Guarantee — Long-term material warranty by grade\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Commercial and large-scale project specialists on hand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is HDPE easier or harder to install than EPDM?\u003c\/strong\u003e\u003cbr\u003eA: HDPE is less flexible, making it better suited to regular pond shapes. For irregular naturalistic ponds, EPDM is typically easier to install. For rectangular or commercial ponds, HDPE is excellent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I join HDPE myself?\u003c\/strong\u003e\u003cbr\u003eA: HDPE joins require heat welding — a professional process. For DIY installations, plan your pond size to use a single HDPE sheet without joins, or use EPDM if joins are needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does HDPE compare to EPDM for a garden pond?\u003c\/strong\u003e\u003cbr\u003eA: For standard garden ponds with natural shapes, EPDM is typically the better choice due to superior flexibility. HDPE excels in large, regular-shaped installations and environments with extreme chemical or UV exposure.\u003c\/p\u003e","brand":"PondLinersco.co.uk","offers":[{"title":"2.5m x 2.5m","offer_id":53773583909212,"sku":"PL-HDPE-2.5x2.5","price":58.95,"currency_code":"GBP","in_stock":true},{"title":"2.5m x 3m","offer_id":53773583941980,"sku":"PL-HDPE-2.5x3","price":68.51,"currency_code":"GBP","in_stock":true},{"title":"3m x 3m","offer_id":53773583974748,"sku":"PL-HDPE-3x3","price":76.47,"currency_code":"GBP","in_stock":true},{"title":"3m x 4m","offer_id":53773584007516,"sku":"PL-HDPE-3x4","price":97.2,"currency_code":"GBP","in_stock":true},{"title":"3m x 5m","offer_id":53773584040284,"sku":"PL-HDPE-3x5","price":127.48,"currency_code":"GBP","in_stock":true},{"title":"3.5m x 5m","offer_id":53773584073052,"sku":"PL-HDPE-3.5x5","price":152.99,"currency_code":"GBP","in_stock":true},{"title":"4m x 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38m","offer_id":53773585416540,"sku":"PL-HDPE-26x38","price":7014.08,"currency_code":"GBP","in_stock":true},{"title":"30m x 40m","offer_id":53773585449308,"sku":"PL-HDPE-30x40","price":7952.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/ecb8aaebc0f52f7ab3d9c6ede440e489.jpg?v=1779039856"},{"product_id":"industrial-heavy-duty-pond-liners-with-free-underlay-and-lifetime-guarantee","title":"Polyex Pond Liner | Reversible Black\/Brown | Lifetime Guarantee","description":"\u003ch2\u003ePolyex Pond Liner UK — Reversible Black\/Brown | Lifetime Guarantee | Fish Safe | Flexible\u003c\/h2\u003e\n\u003cp\u003eOur \u003cstrong\u003ePolyex Pond Liner\u003c\/strong\u003e offers something unique in the UK pond liner market: a reversible black\/brown design that gives you flexibility in how your pond looks. Black for the classic reflective pond appearance; brown for a more natural, earthy aesthetic that blends with surrounding garden soil and plantings. One liner, two looks — backed by a Lifetime Guarantee.\u003c\/p\u003e\n\u003cp\u003ePolyex is an advanced polyethylene formulation that combines the flexibility and fish-safe certification of modern pond liner with an innovative dual-colour design. It is the preferred choice for pond builders who want visual options and long-term performance from their liner investment.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolyex (Advanced Polyethylene Formulation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eReversible Black \/ Brown (unique dual-colour)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-20°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — UV stabilised on both sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — certified safe for all aquatic life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Guarantee\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eGood — flexible and easy to install\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnique Feature\u003c\/td\u003e\n\u003ctd\u003eReversible — use either side facing up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for Polyex Reversible Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🌿 \u003cstrong\u003eNatural Pond Gardens\u003c\/strong\u003e — Brown-side-up creates a natural earthy tone blending beautifully with planted margins and natural stone edging\u003c\/li\u003e\n\u003cli\u003e🪴 \u003cstrong\u003eContemporary Garden Features\u003c\/strong\u003e — Black-side-up provides the clean, reflective surface preferred in modern garden design\u003c\/li\u003e\n\u003cli\u003e🐸 \u003cstrong\u003eWildlife Ponds\u003c\/strong\u003e — The brown side mimics natural pond bottom colours, making wildlife ponds more naturalistic and encouraging wildlife\u003c\/li\u003e\n\u003cli\u003e🏡 \u003cstrong\u003eDIY Garden Ponds\u003c\/strong\u003e — Excellent choice for first-time pond builders who want premium performance with installation flexibility\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eBog Gardens\u003c\/strong\u003e — The brown side creates a natural appearance in shallow bog garden installations with marginal planting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose your side\u003c\/strong\u003e — Decide before laying whether you want the black or brown face up. Natural plantings suit brown; formal designs suit black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare the ground\u003c\/strong\u003e — Remove all sharp stones and roots. Apply a 50mm sand layer to the base for additional protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall geotextile underlay\u003c\/strong\u003e — Lay 200gsm geotextile underlay before the Polyex liner — essential to protect against stone punctures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition the Polyex liner\u003c\/strong\u003e — Unfold with your chosen side facing up, position centrally over the pond, and allow to warm in sunlight for maximum flexibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm, secure and fill\u003c\/strong\u003e — Gently press liner into contours, creating smooth folds at corners. Secure edges under coping and fill slowly with water\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose Polyex?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUnique reversible design — only pond liner available in two usable colours\u003c\/li\u003e\n\u003cli\u003eLifetime guarantee — premium-grade material backing\u003c\/li\u003e\n\u003cli\u003eUV stabilised on both sides — both black and brown surfaces independently UV stabilised\u003c\/li\u003e\n\u003cli\u003eFish safe — safe for all fish species and aquatic wildlife from day one\u003c\/li\u003e\n\u003cli\u003eVersatile — suitable for a wide range of pond sizes and styles\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Safe for all fish species and pond wildlife\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ Lifetime Guarantee — Premium lifetime material warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team can help you choose the right side and size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I change which side faces up after the pond is built?\u003c\/strong\u003e\u003cbr\u003eA: This would require emptying and re-laying the liner — not practical once the pond is filled. Choose your preferred side carefully before installation. Brown is generally preferred for natural pond aesthetics; black for formal or contemporary designs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is Polyex the same as standard LDPE pond liner?\u003c\/strong\u003e\u003cbr\u003eA: Polyex is an advanced polyethylene formulation with specific additives for UV stability, fish safety, and the unique dual-colour design. It is a premium product compared to standard LDPE.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What happens if I install Polyex with the wrong side up?\u003c\/strong\u003e\u003cbr\u003eA: Both sides are fully functional — UV stabilised and fish safe. If you install with the wrong colour facing up, the liner will still perform perfectly. The choice is purely aesthetic.\u003c\/p\u003e","brand":"PondLinersco.co.uk","offers":[{"title":"2.0m x 2.0m","offer_id":53773595574620,"sku":"PL-IHD1-2.0x2.0","price":74.89,"currency_code":"GBP","in_stock":true},{"title":"3m x 2.5m","offer_id":53773595607388,"sku":"PL-IHD1-3x2.5","price":101.97,"currency_code":"GBP","in_stock":true},{"title":"3m x 3m","offer_id":53773595640156,"sku":"PL-IHD1-3x3","price":111.54,"currency_code":"GBP","in_stock":true},{"title":"4m x 3m","offer_id":53773595672924,"sku":"PL-IHD1-4x3","price":143.41,"currency_code":"GBP","in_stock":true},{"title":"4m x 4m","offer_id":53773595705692,"sku":"PL-IHD1-4x4","price":196.02,"currency_code":"GBP","in_stock":true},{"title":"5m x 3.5m","offer_id":53773595738460,"sku":"PL-IHD1-5x3.5","price":211.96,"currency_code":"GBP","in_stock":true},{"title":"5m x 4m","offer_id":53773595771228,"sku":"PL-IHD1-5x4","price":239.05,"currency_code":"GBP","in_stock":true},{"title":"5m x 5m","offer_id":53773595803996,"sku":"PL-IHD1-5x5","price":293.24,"currency_code":"GBP","in_stock":true},{"title":"6m x 4.5m","offer_id":53773595836764,"sku":"PL-IHD1-6x4.5","price":318.74,"currency_code":"GBP","in_stock":true},{"title":"6m x 5m","offer_id":53773595869532,"sku":"PL-IHD1-6x5","price":353.8,"currency_code":"GBP","in_stock":true},{"title":"6m x 6m","offer_id":53773595902300,"sku":"PL-IHD1-6x6","price":533.9,"currency_code":"GBP","in_stock":true},{"title":"7m x 4m","offer_id":53773595935068,"sku":"PL-IHD1-7x4","price":353.8,"currency_code":"GBP","in_stock":true},{"title":"7m x 4.5m","offer_id":53773595967836,"sku":"PL-IHD1-7x4.5","price":387.27,"currency_code":"GBP","in_stock":true},{"title":"7m x 5m","offer_id":53773596000604,"sku":"PL-IHD1-7x5","price":419.15,"currency_code":"GBP","in_stock":true},{"title":"7m x 5.5m","offer_id":53773596033372,"sku":"PL-IHD1-7x5.5","price":452.61,"currency_code":"GBP","in_stock":true},{"title":"7.5m x 4m","offer_id":53773596066140,"sku":"PL-IHD1-7.5x4","price":353.8,"currency_code":"GBP","in_stock":true},{"title":"7.5m x 4.5m","offer_id":53773596098908,"sku":"PL-IHD1-7.5x4.5","price":403.21,"currency_code":"GBP","in_stock":true},{"title":"7.5m x 5m","offer_id":53773596131676,"sku":"PL-IHD1-7.5x5","price":444.65,"currency_code":"GBP","in_stock":true},{"title":"7.5m x 5.5m","offer_id":53773596164444,"sku":"PL-IHD1-7.5x5.5","price":478.11,"currency_code":"GBP","in_stock":true},{"title":"10m x 1m","offer_id":53773596197212,"sku":"PL-IHD1-10x1","price":133.85,"currency_code":"GBP","in_stock":true},{"title":"10m x 2m","offer_id":53773596229980,"sku":"PL-IHD1-10x2","price":237.46,"currency_code":"GBP","in_stock":true},{"title":"11m x 10m","offer_id":53773596262748,"sku":"PL-IHD1-11x10","price":1274.99,"currency_code":"GBP","in_stock":true},{"title":"11m x 11m","offer_id":53773596295516,"sku":"PL-IHD1-11x1","price":1416.84,"currency_code":"GBP","in_stock":true},{"title":"12m x 10m","offer_id":53773596328284,"sku":"PL-IHD1-12x10","price":1469.42,"currency_code":"GBP","in_stock":true},{"title":"12m x 11m","offer_id":53773596361052,"sku":"PL-IHD1-12x11","price":1592.15,"currency_code":"GBP","in_stock":true},{"title":"12m x 12m","offer_id":53773596393820,"sku":"PL-IHD1-12x12","price":1751.53,"currency_code":"GBP","in_stock":true},{"title":"30m x 15m","offer_id":53773596426588,"sku":"PL-IHD1-30x15","price":5417.14,"currency_code":"GBP","in_stock":true},{"title":"30m x 18m","offer_id":53773596459356,"sku":"PL-IHD1-30x18","price":6373.39,"currency_code":"GBP","in_stock":true},{"title":"35m x 20m","offer_id":53773596492124,"sku":"PL-IHD1-35x20","price":7793.41,"currency_code":"GBP","in_stock":true},{"title":"50m x 10m","offer_id":53773596557660,"sku":"PL-IHD1-50x10","price":6373.39,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/1b96ff272a8fa21be5ada5089b977680.jpg?v=1779040083"},{"product_id":"industrial-heavy-duty-pond-liner-25-year-guarantee-pond-lining","title":"HDPE Pond Liner | Industrial Grade | 25 Year Guarantee","description":"\u003ch2\u003eHDPE Pond Liner UK — Heavy Duty | UV Stabilised | Long Guarantee | Fish Safe | Free Delivery\u003c\/h2\u003e\n\u003cp\u003eFor large-scale pond projects, commercial water features, and installations requiring maximum UV stability and chemical resistance, our \u003cstrong\u003eHDPE Pond Liner\u003c\/strong\u003e is the professional's choice. High-Density Polyethylene is one of the world's most widely used liner materials for reservoirs, commercial ponds, and large water containment systems — and our HDPE pond liner brings that industrial-grade performance to UK garden and commercial pond installations.\u003c\/p\u003e\n\u003cp\u003eHDPE (High-Density Polyethylene) is engineered for long-term outdoor performance. Its inherent density creates exceptional resistance to UV radiation, chemical attack, and biological degradation — making it the preferred material for ponds where environmental exposure is extreme and liner replacement would be prohibitively expensive.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.35mm–1.0mm+ (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — UV stabilised with carbon black pigment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — food-grade polyethylene, certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e25–40 Years (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemical Resistance\u003c\/td\u003e\n\u003ctd\u003eOutstanding — resists acids, alkalis, oils\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eGood — less flexible than EPDM; best for regular shapes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack (UV-stable carbon black pigment)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for HDPE Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🏭 \u003cstrong\u003eCommercial Fish Farms\u003c\/strong\u003e — HDPE's food-grade certification makes it ideal for aquaculture and commercial fish production\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eLarge Agricultural Ponds\u003c\/strong\u003e — Irrigation reservoirs and livestock water storage where long-term chemical resistance is essential\u003c\/li\u003e\n\u003cli\u003e🌊 \u003cstrong\u003eCanal and Waterway Lining\u003c\/strong\u003e — Commercial waterway projects where HDPE's tensile strength and weldability are required\u003c\/li\u003e\n\u003cli\u003e🏗️ \u003cstrong\u003eFormal Concrete-Edged Ponds\u003c\/strong\u003e — HDPE's dimensional stability suits rectangular and regular-shaped formal ponds\u003c\/li\u003e\n\u003cli\u003e☀️ \u003cstrong\u003eHigh-UV Exposure Sites\u003c\/strong\u003e — Where continuous direct sunlight over decades is a factor — HDPE's UV stabilisation is industry-leading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare a smooth substrate\u003c\/strong\u003e — A compacted sand layer of 50–100mm provides the ideal base for HDPE installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderlay is essential\u003c\/strong\u003e — Lay 200gsm geotextile underlay before the HDPE liner to protect against stone punctures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition the HDPE\u003c\/strong\u003e — HDPE is heavier and less flexible — plan carefully before positioning. Large sheets may require additional labour\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeam welding for joins\u003c\/strong\u003e — Where multiple sheets are required, HDPE must be joined by hot-air or extrusion welding — a professional process\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnchor and backfill\u003c\/strong\u003e — HDPE edges are typically anchored in a concrete anchor trench or under concrete coping\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose HDPE?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndustry-leading UV stability via carbon-black pigmentation\u003c\/li\u003e\n\u003cli\u003eOutstanding chemical resistance — resists acids, alkalis, and oils\u003c\/li\u003e\n\u003cli\u003eDimensional stability — does not creep or deform under load\u003c\/li\u003e\n\u003cli\u003eWeldable — can be heat-welded into any shape for commercial projects\u003c\/li\u003e\n\u003cli\u003e25–40 year guarantees reflecting proven longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Food-grade polyethylene, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 25–40 Year Guarantee — Long-term material warranty by grade\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Commercial and large-scale project specialists on hand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is HDPE easier or harder to install than EPDM?\u003c\/strong\u003e\u003cbr\u003eA: HDPE is less flexible, making it better suited to regular pond shapes. For irregular naturalistic ponds, EPDM is typically easier to install. For rectangular or commercial ponds, HDPE is excellent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I join HDPE myself?\u003c\/strong\u003e\u003cbr\u003eA: HDPE joins require heat welding — a professional process. For DIY installations, plan your pond size to use a single HDPE sheet without joins, or use EPDM if joins are needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does HDPE compare to EPDM for a garden pond?\u003c\/strong\u003e\u003cbr\u003eA: For standard garden ponds with natural shapes, EPDM is typically the better choice due to superior flexibility. 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Low-Density Polyethylene combines genuine flexibility with fish-safe certification at the most accessible price point in our liner range — making quality pond construction available to every UK gardener, regardless of budget.\u003c\/p\u003e\n\u003cp\u003eLDPE (Low-Density Polyethylene) is a trusted polymer widely used in water containment, horticulture, and food-contact applications. Its molecular structure makes it naturally flexible, resistant to cracking, and chemically inert — providing a safe, reliable pond liner for garden ponds, water features, and bog gardens.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eLow-Density Polyethylene (LDPE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.35mm standard grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-10°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eGood — UV stabilised\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — food-grade polyethylene, certified safe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e15–25 Years (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eGood — lightweight and easy to work with\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eVery light — easiest liner to handle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCutting\u003c\/td\u003e\n\u003ctd\u003eEasy — scissors or sharp knife\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for LDPE Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🌱 \u003cstrong\u003eSmall Garden Ponds\u003c\/strong\u003e — Decorative goldfish ponds and small wildlife ponds up to approximately 4x4m and 0.5m depth\u003c\/li\u003e\n\u003cli\u003e🌿 \u003cstrong\u003eBog Gardens\u003c\/strong\u003e — Shallow planting areas with waterlogged conditions, perfect for marginal and bog plants\u003c\/li\u003e\n\u003cli\u003e🌸 \u003cstrong\u003eContainer Pond Features\u003c\/strong\u003e — Lining raised timber containers, half-barrels, and planter ponds for balconies and patios\u003c\/li\u003e\n\u003cli\u003e🐦 \u003cstrong\u003eBird Baths and Wildlife Drinking Features\u003c\/strong\u003e — Very shallow features for garden birds and hedgehogs needing easy water access\u003c\/li\u003e\n\u003cli\u003e🏡 \u003cstrong\u003eTemporary Seasonal Ponds\u003c\/strong\u003e — Seasonal water features that may be repositioned or altered as garden designs evolve\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDig your pond\u003c\/strong\u003e — Excavate to desired shape. LDPE is best suited to shallower ponds (up to 0.6m). Remove all stones, glass, and sharp roots\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmooth the ground\u003c\/strong\u003e — A sand layer of 25–50mm significantly improves LDPE performance by eliminating sharp protrusions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLay geotextile underlay\u003c\/strong\u003e — Essential with LDPE. The underlay protects against punctures more likely with thinner material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition the LDPE liner\u003c\/strong\u003e — Very easy to handle — lightweight and manageable for one person. Unfold over the pond and drape into shape naturally\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure and fill\u003c\/strong\u003e — Fold edges under edging stones or bury in turf. Fill slowly, adjusting folds as the pond fills\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose LDPE?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBest price point — most affordable flexible pond liner in our range\u003c\/li\u003e\n\u003cli\u003eEasiest handling — lightest liner material, easy to position and cut without assistance\u003c\/li\u003e\n\u003cli\u003eFish safe — food-grade polyethylene safe for goldfish, pond plants, and garden wildlife\u003c\/li\u003e\n\u003cli\u003eFlexible — bends and drapes easily around pond contours without cracking\u003c\/li\u003e\n\u003cli\u003eReadily repairable — LDPE patch tape repairs are quick and inexpensive\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Food-grade polyethylene, safe for goldfish and all pond life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 15–25 Year Guarantee — Reliable medium-term warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team will help you choose the right size and grade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum pond depth suitable for LDPE liner?\u003c\/strong\u003e\u003cbr\u003eA: We recommend LDPE for ponds up to 0.6m deep. For deeper ponds, upgrade to EPDM 0.75mm or 1.0mm for better durability and puncture resistance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is LDPE the same material as plastic sheeting?\u003c\/strong\u003e\u003cbr\u003eA: LDPE is a polyethylene material, but our pond liner grade is specifically formulated with UV stabilisers, fish-safe additives, and quality controls that standard plastic sheeting does not have. Never use generic plastic sheeting as a pond liner.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use LDPE for a pond with goldfish?\u003c\/strong\u003e\u003cbr\u003eA: Yes. LDPE is certified fish-safe and suitable for goldfish, shubunkins, and most common pond fish species. 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Create a smooth surface — PVC benefits from thorough preparation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlways use underlay\u003c\/strong\u003e — Geotextile underlay is even more important with PVC than with thicker rubber liners. Lay 200gsm underlay across all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnfold and position\u003c\/strong\u003e — PVC is lightweight and easy to handle. Unfold over the pond in warm conditions and allow to drape naturally into shape\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm and fold\u003c\/strong\u003e — Gently press liner into pond contours. PVC folds more easily than rubber liners — use broad, flat folds at corners\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure and fill\u003c\/strong\u003e — Fold edges under coping or turf and fill with water. PVC will settle into its final position as the pond fills\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose PVC?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eExcellent value — solid pond containment at the most accessible price in the flexible liner range\u003c\/li\u003e\n\u003cli\u003eEasy handling — lighter weight than rubber liners makes solo installation easier\u003c\/li\u003e\n\u003cli\u003eSimple repairs — PVC repair kits are inexpensive and easy to apply\u003c\/li\u003e\n\u003cli\u003eFish safe — modern fish-safe PVC formulations are safe for all common pond fish\u003c\/li\u003e\n\u003cli\u003eGood flexibility — flexible enough for most pond shapes in UK gardens\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Fish-safe plasticiser formulation, safe for all pond species\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 15–30 Year Guarantee — Solid medium-term material warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team can help you choose the right thickness and size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long does PVC pond liner last compared to EPDM?\u003c\/strong\u003e\u003cbr\u003eA: Quality PVC pond liner installed with underlay typically lasts 15–20 years in UK conditions. 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Flexible enough to mould to complex pond shapes, yet durable enough to provide long-term waterproofing, PVC pond liner is the choice of countless UK pond builders every year.\u003c\/p\u003e\n\u003cp\u003ePVC (Polyvinyl Chloride) pond liner has been used successfully in UK garden ponds for decades. Modern PVC pond liners are significantly improved over earlier generations — with enhanced UV stabilisers, plasticiser retention additives, and fish-safe formulations that address the limitations of older materials.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolyvinyl Chloride (PVC) — UV stabilised\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.3mm–0.5mm (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-10°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eGood — UV stabilised formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — fish-safe plasticiser formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e15–30 Years (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eGood — flexible, easy to handle and cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRepair\u003c\/td\u003e\n\u003ctd\u003eEasy — PVC repair tape or patch kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eLighter than EPDM or Butyl — easy to handle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for PVC Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🌸 \u003cstrong\u003eOrnamental Garden Ponds\u003c\/strong\u003e — PVC provides reliable watertight containment for decorative garden ponds with goldfish and aquatic plants\u003c\/li\u003e\n\u003cli\u003e🐦 \u003cstrong\u003eWildlife Pond Installations\u003c\/strong\u003e — An affordable option for creating wildlife habitats — frogs, newts, and aquatic insects thrive with fish-safe PVC\u003c\/li\u003e\n\u003cli\u003e🌿 \u003cstrong\u003eRaised Pond Planters\u003c\/strong\u003e — PVC's lighter weight and ease of cutting makes it ideal for lining raised timber pond planters and containers\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eSmall Water Features\u003c\/strong\u003e — Bubble fountains, millstone features, and small rill channels are easily lined with flexible PVC\u003c\/li\u003e\n\u003cli\u003e🏠 \u003cstrong\u003eFirst Garden Ponds\u003c\/strong\u003e — An excellent starting point for first-time pond builders before investing in more expensive materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDig and prepare\u003c\/strong\u003e — Excavate your pond shape, removing all stones and sharp roots. Create a smooth surface — PVC benefits from thorough preparation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlways use underlay\u003c\/strong\u003e — Geotextile underlay is even more important with PVC than with thicker rubber liners. Lay 200gsm underlay across all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnfold and position\u003c\/strong\u003e — PVC is lightweight and easy to handle. Unfold over the pond in warm conditions and allow to drape naturally into shape\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm and fold\u003c\/strong\u003e — Gently press liner into pond contours. PVC folds more easily than rubber liners — use broad, flat folds at corners\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure and fill\u003c\/strong\u003e — Fold edges under coping or turf and fill with water. PVC will settle into its final position as the pond fills\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose PVC?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eExcellent value — solid pond containment at the most accessible price in the flexible liner range\u003c\/li\u003e\n\u003cli\u003eEasy handling — lighter weight than rubber liners makes solo installation easier\u003c\/li\u003e\n\u003cli\u003eSimple repairs — PVC repair kits are inexpensive and easy to apply\u003c\/li\u003e\n\u003cli\u003eFish safe — modern fish-safe PVC formulations are safe for all common pond fish\u003c\/li\u003e\n\u003cli\u003eGood flexibility — flexible enough for most pond shapes in UK gardens\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Fish-safe plasticiser formulation, safe for all pond species\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 15–30 Year Guarantee — Solid medium-term material warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team can help you choose the right thickness and size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long does PVC pond liner last compared to EPDM?\u003c\/strong\u003e\u003cbr\u003eA: Quality PVC pond liner installed with underlay typically lasts 15–20 years in UK conditions. EPDM has a longer proven lifespan of 40+ years. For long-term installations, EPDM is often the better investment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use PVC liner for a koi pond?\u003c\/strong\u003e\u003cbr\u003eA: PVC is fish-safe and suitable for koi in the short to medium term. For high-value koi collections, EPDM or Butyl is recommended for superior longevity and puncture resistance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I repair a PVC pond liner?\u003c\/strong\u003e\u003cbr\u003eA: PVC liner repairs are straightforward. For small punctures, PVC repair tape can be applied without draining the pond. For larger damage, a PVC patch kit with PVC solvent adhesive provides a permanent, watertight repair.\u003c\/p\u003e","brand":"PondLinersco.co.uk","offers":[{"title":"2m x 2m","offer_id":55305417163100,"sku":"PVC-05-2mX2m","price":78.74,"currency_code":"GBP","in_stock":true},{"title":"3m x 2m","offer_id":55305417195868,"sku":"PVC-05-3mX2m","price":104.99,"currency_code":"GBP","in_stock":true},{"title":"3m x 3m","offer_id":55305417228636,"sku":"PVC-05-3mX3m","price":159.99,"currency_code":"GBP","in_stock":true},{"title":"4m x 3m","offer_id":55305417261404,"sku":"PVC-05-4mX3m","price":194.99,"currency_code":"GBP","in_stock":true},{"title":"4m x 4m","offer_id":55305417294172,"sku":"PVC-05-4mX4m","price":266.24,"currency_code":"GBP","in_stock":true},{"title":"5m x 2m","offer_id":55305417326940,"sku":"PVC-05-5mX2m","price":173.74,"currency_code":"GBP","in_stock":true},{"title":"5m x 3m","offer_id":55305417359708,"sku":"PVC-05-5mX3m","price":248.74,"currency_code":"GBP","in_stock":true},{"title":"5m x 4m","offer_id":55305417392476,"sku":"PVC-05-5mX4m","price":328.74,"currency_code":"GBP","in_stock":true},{"title":"5m x 5m","offer_id":55305417425244,"sku":"PVC-05-5mX5m","price":402.49,"currency_code":"GBP","in_stock":true},{"title":"6m x 3m","offer_id":55305417458012,"sku":"PVC-05-6mX3m","price":291.24,"currency_code":"GBP","in_stock":true},{"title":"6m x 4m","offer_id":55305417490780,"sku":"PVC-05-6mX4m","price":396.24,"currency_code":"GBP","in_stock":true},{"title":"6m x 5m","offer_id":55305417523548,"sku":"PVC-05-6mX5m","price":478.74,"currency_code":"GBP","in_stock":true},{"title":"6m x 6m","offer_id":55305417556316,"sku":"PVC-05-6mX6m","price":581.24,"currency_code":"GBP","in_stock":true},{"title":"7m x 5m","offer_id":55305417589084,"sku":"PVC-05-7mX5m","price":562.49,"currency_code":"GBP","in_stock":true},{"title":"7m x 6m","offer_id":55305417621852,"sku":"PVC-05-7mX6m","price":669.99,"currency_code":"GBP","in_stock":true},{"title":"8m x 5m","offer_id":55305417654620,"sku":"PVC-05-8mX5m","price":641.24,"currency_code":"GBP","in_stock":true},{"title":"8m x 6m","offer_id":55305417687388,"sku":"PVC-05-8mX6m","price":758.74,"currency_code":"GBP","in_stock":true},{"title":"8m x 7m","offer_id":55305417720156,"sku":"PVC-05-8mX7m","price":884.99,"currency_code":"GBP","in_stock":true},{"title":"8m x 8m","offer_id":55305417752924,"sku":"PVC-05-8mX8m","price":1016.24,"currency_code":"GBP","in_stock":true},{"title":"9m x 6m","offer_id":55305417785692,"sku":"PVC-05-9mX6m","price":858.74,"currency_code":"GBP","in_stock":true},{"title":"9m x 7m","offer_id":55305417818460,"sku":"PVC-05-9mX7m","price":998.74,"currency_code":"GBP","in_stock":true},{"title":"9m x 8m","offer_id":55305417851228,"sku":"PVC-05-9mX8m","price":1137.49,"currency_code":"GBP","in_stock":true},{"title":"10m x 6m","offer_id":55305417883996,"sku":"PVC-05-10mX6m","price":944.99,"currency_code":"GBP","in_stock":true},{"title":"10m x 7m","offer_id":55305417916764,"sku":"PVC-05-10mX7m","price":1109.99,"currency_code":"GBP","in_stock":true},{"title":"10m x 8m","offer_id":55305417949532,"sku":"PVC-05-10mX8m","price":1324.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/b8a7394996a1332df6aa0a2a805fafe0.jpg?v=1779040384"},{"product_id":"premium-pond-liner-underlay-sheets-heavy-duty-200gsm-best-selling-easy-cut-long-lasting-protection","title":"Pond Liner Underlay 200gsm | Heavy Duty Geotextile | Protects All Liner Types","description":"\u003ch2\u003ePond Liner Underlay 200gsm UK — Heavy Duty Geotextile | Essential Protection | All Liner Types\u003c\/h2\u003e\n\u003cp\u003eThe single most important accessory for any pond liner installation — our \u003cstrong\u003e200gsm Heavy Duty Geotextile Pond Liner Underlay\u003c\/strong\u003e is the protective foundation that keeps your pond liner in perfect condition for decades. Professional pond builders consider underlay non-negotiable: a pond liner without underlay is a pond liner waiting to fail.\u003c\/p\u003e\n\u003cp\u003eOur geotextile underlay is a heavy-duty 200gsm needle-punched polypropylene fabric — the same professional specification used in commercial reservoir lining, landscape drainage, and civil engineering projects. It acts as a cushion between the ground and your pond liner, absorbing the shock of stones, roots, and ground movement that would otherwise puncture or stress your investment over time.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eNeedle-punched polypropylene geotextile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e200gsm (grams per square metre)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003eApproximately 2mm uncompressed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-30°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eGood (protected by liner once installed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — inert polypropylene, non-toxic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e20 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eAll pond liner types: EPDM, Butyl, PVC, HDPE, LDPE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Permeability\u003c\/td\u003e\n\u003ctd\u003eHigh — allows drainage, does not trap water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eGrey\/Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Reasons Underlay Is Essential\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🛡️ \u003cstrong\u003eStone Puncture Protection\u003c\/strong\u003e — Even carefully prepared ground contains sharp stones that can work upward through soil movement. Underlay provides a tough buffer preventing these from reaching your liner\u003c\/li\u003e\n\u003cli\u003e🌱 \u003cstrong\u003eRoot Penetration Barrier\u003c\/strong\u003e — Aquatic plant roots can penetrate most liner materials over time. 200gsm geotextile significantly reduces this risk\u003c\/li\u003e\n\u003cli\u003e🌡️ \u003cstrong\u003eThermal Insulation\u003c\/strong\u003e — Provides a layer of insulation beneath the liner, helping maintain more stable water temperatures in winter\u003c\/li\u003e\n\u003cli\u003e⚡ \u003cstrong\u003eGround Movement Cushioning\u003c\/strong\u003e — Soils expand and contract with moisture changes and frost. Underlay absorbs this movement, preventing it from stressing the liner\u003c\/li\u003e\n\u003cli\u003e⏰ \u003cstrong\u003eExtended Liner Life\u003c\/strong\u003e — Pond liners installed with geotextile underlay last significantly longer than those without. The underlay investment pays for itself many times over\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcavate and clean\u003c\/strong\u003e — Dig your pond and remove all large stones, roots, glass, and sharp debris. The cleaner the substrate, the better\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll out the underlay\u003c\/strong\u003e — Starting from one end, roll the underlay fabric into the excavation and press flat against all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap at edges\u003c\/strong\u003e — Allow 30–40cm of underlay to extend beyond the pond edge in all directions, protecting the liner at its most vulnerable point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap joins\u003c\/strong\u003e — If multiple pieces are needed, overlap by at least 300mm. No adhesive needed — the liner weight holds all pieces in position\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall liner on top\u003c\/strong\u003e — Your chosen pond liner is installed directly on top of the underlay. The two layers work together to provide optimal protection\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eCompatible With All Pond Liner Types\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ EPDM Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ Butyl Rubber Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ PVC Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ HDPE Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ LDPE Pond Liner — all grades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Inert polypropylene, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 20 Year Guarantee — Long-term fabric warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team can help calculate the exact quantity needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I really need underlay, or can I use sand instead?\u003c\/strong\u003e\u003cbr\u003eA: Sand is a good supplement but not a replacement for geotextile underlay. Sand can be washed away by water movement during pond filling, leaving voids that create pressure points. Use both sand (50mm base layer) AND geotextile underlay for the best protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How much underlay do I need?\u003c\/strong\u003e\u003cbr\u003eA: Order the same dimensions as your pond liner. Add 30–40cm on each dimension for edge overlap — or simply order the next size up if you're between sizes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can underlay be used for other applications?\u003c\/strong\u003e\u003cbr\u003eA: Yes. 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High-Density Polyethylene is one of the world's most widely used liner materials for reservoirs, commercial ponds, and large water containment systems — and our HDPE pond liner brings that industrial-grade performance to UK garden and commercial pond installations.\u003c\/p\u003e\n\u003cp\u003eHDPE (High-Density Polyethylene) is engineered for long-term outdoor performance. Its inherent density creates exceptional resistance to UV radiation, chemical attack, and biological degradation — making it the preferred material for ponds where environmental exposure is extreme and liner replacement would be prohibitively expensive.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-Density Polyethylene (HDPE)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.35mm–1.0mm+ (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — UV stabilised with carbon black pigment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — food-grade polyethylene, certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e25–40 Years (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemical Resistance\u003c\/td\u003e\n\u003ctd\u003eOutstanding — resists acids, alkalis, oils\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eGood — less flexible than EPDM; best for regular shapes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack (UV-stable carbon black pigment)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTensile Strength\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for HDPE Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🏭 \u003cstrong\u003eCommercial Fish Farms\u003c\/strong\u003e — HDPE's food-grade certification makes it ideal for aquaculture and commercial fish production\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eLarge Agricultural Ponds\u003c\/strong\u003e — Irrigation reservoirs and livestock water storage where long-term chemical resistance is essential\u003c\/li\u003e\n\u003cli\u003e🌊 \u003cstrong\u003eCanal and Waterway Lining\u003c\/strong\u003e — Commercial waterway projects where HDPE's tensile strength and weldability are required\u003c\/li\u003e\n\u003cli\u003e🏗️ \u003cstrong\u003eFormal Concrete-Edged Ponds\u003c\/strong\u003e — HDPE's dimensional stability suits rectangular and regular-shaped formal ponds\u003c\/li\u003e\n\u003cli\u003e☀️ \u003cstrong\u003eHigh-UV Exposure Sites\u003c\/strong\u003e — Where continuous direct sunlight over decades is a factor — HDPE's UV stabilisation is industry-leading\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare a smooth substrate\u003c\/strong\u003e — A compacted sand layer of 50–100mm provides the ideal base for HDPE installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderlay is essential\u003c\/strong\u003e — Lay 200gsm geotextile underlay before the HDPE liner to protect against stone punctures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePosition the HDPE\u003c\/strong\u003e — HDPE is heavier and less flexible — plan carefully before positioning. Large sheets may require additional labour\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeam welding for joins\u003c\/strong\u003e — Where multiple sheets are required, HDPE must be joined by hot-air or extrusion welding — a professional process\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnchor and backfill\u003c\/strong\u003e — HDPE edges are typically anchored in a concrete anchor trench or under concrete coping\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose HDPE?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIndustry-leading UV stability via carbon-black pigmentation\u003c\/li\u003e\n\u003cli\u003eOutstanding chemical resistance — resists acids, alkalis, and oils\u003c\/li\u003e\n\u003cli\u003eDimensional stability — does not creep or deform under load\u003c\/li\u003e\n\u003cli\u003eWeldable — can be heat-welded into any shape for commercial projects\u003c\/li\u003e\n\u003cli\u003e25–40 year guarantees reflecting proven longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Food-grade polyethylene, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 25–40 Year Guarantee — Long-term material warranty by grade\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Commercial and large-scale project specialists on hand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is HDPE easier or harder to install than EPDM?\u003c\/strong\u003e\u003cbr\u003eA: HDPE is less flexible, making it better suited to regular pond shapes. For irregular naturalistic ponds, EPDM is typically easier to install. For rectangular or commercial ponds, HDPE is excellent.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I join HDPE myself?\u003c\/strong\u003e\u003cbr\u003eA: HDPE joins require heat welding — a professional process. For DIY installations, plan your pond size to use a single HDPE sheet without joins, or use EPDM if joins are needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does HDPE compare to EPDM for a garden pond?\u003c\/strong\u003e\u003cbr\u003eA: For standard garden ponds with natural shapes, EPDM is typically the better choice due to superior flexibility. 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Safe\u003c\/h2\u003e\n\u003cp\u003eRegarded by pond professionals as the premium choice in pond liner materials, our \u003cstrong\u003eButyl Rubber Pond Liner 0.75mm\u003c\/strong\u003e represents the pinnacle of pond liner technology. With superior elasticity, an outstanding 40+ year proven track record, and self-sealing properties unmatched by any synthetic alternative, Butyl remains the material of choice for serious pond builders across the United Kingdom.\u003c\/p\u003e\n\u003cp\u003eButyl rubber (isobutylene-isoprene rubber, IIR) has been used in high-specification pond installations for over 50 years. Its unique molecular structure provides exceptional resistance to UV radiation, ozone, and extreme temperatures — maintaining its integrity long after lesser liner materials have failed.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eButyl Rubber (Isobutylene-Isoprene Rubber — IIR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-50°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eOutstanding — superior to all alternatives\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — certified, completely inert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Guarantee\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation at Break\u003c\/td\u003e\n\u003ctd\u003e400%+ (superior to EPDM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eSuperior — premium stretch and recovery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-Sealing\u003c\/td\u003e\n\u003ctd\u003eMinor punctures tend to self-seal under water pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOzone Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for Premium Butyl Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🏆 \u003cstrong\u003eShow-Quality Koi Ponds\u003c\/strong\u003e — Where fish values of thousands of pounds justify the very best liner material available\u003c\/li\u003e\n\u003cli\u003e🏛️ \u003cstrong\u003eFormal Architectural Water Features\u003c\/strong\u003e — Luxury garden designs by landscape architects specify Butyl for its premium credentials\u003c\/li\u003e\n\u003cli\u003e🌳 \u003cstrong\u003eEstate and Country Garden Ponds\u003c\/strong\u003e — Large ornamental ponds where quality is prioritised and replacement is not an option\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eComplex Water Features\u003c\/strong\u003e — Streams, cascades, and linked pond systems where superior flexibility is critical\u003c\/li\u003e\n\u003cli\u003e🦢 \u003cstrong\u003eLarge Wildlife Reserves\u003c\/strong\u003e — Commercial wildlife pond installations where long-term reliability is essential\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium ground preparation\u003c\/strong\u003e — Apply a 50–75mm sand layer to the base and compact smooth. Butyl's premium performance deserves a premium foundation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeotextile underlay is essential\u003c\/strong\u003e — Lay 200gsm geotextile underlay across all surfaces before the Butyl liner — non-negotiable for maximum liner lifespan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCareful unfolding\u003c\/strong\u003e — Butyl is heavier than EPDM and benefits from two-person handling on larger sizes. Unfold carefully on a warm day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm with care\u003c\/strong\u003e — Butyl's exceptional elasticity makes forming easy — it stretches readily to contours without stress marks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure permanently\u003c\/strong\u003e — Butyl edges can be bedded under coping stones, sealed with Butyl tape, or chemically bonded. Our technical team can advise on the best termination detail\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Butyl Is the Premium Choice\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e400%+ stretch — handles complex shapes and ground movement with ease\u003c\/li\u003e\n\u003cli\u003eProven 50+ year longevity in real-world installations\u003c\/li\u003e\n\u003cli\u003eSelf-sealing — minor punctures close under water pressure\u003c\/li\u003e\n\u003cli\u003eRemains flexible to -50°C — the best cold-weather performance of any pond liner\u003c\/li\u003e\n\u003cli\u003eSpecified in premium landscape architecture projects across the UK\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Completely inert, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ Lifetime Guarantee — Premium lifetime material warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Speak to our Butyl installation specialists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is Butyl worth the premium over EPDM?\u003c\/strong\u003e\u003cbr\u003eA: For high-value koi ponds, formal garden features, or installations where longevity over 50+ years is important, Butyl's superior elasticity and self-sealing properties make it worth the additional investment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I join two Butyl sheets for a large pond?\u003c\/strong\u003e\u003cbr\u003eA: Butyl sheets can be joined using specialist Butyl bonding tape and primer, creating a molecular bond as strong as the liner itself.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will Butyl liner affect water chemistry?\u003c\/strong\u003e\u003cbr\u003eA: No. Butyl is completely chemically inert. 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Flexible, fish-safe, UV-resistant, and backed by a Lifetime Guarantee, this is the liner trusted by garden designers, pond contractors, and DIY enthusiasts across the United Kingdom.\u003c\/p\u003e\n\u003cp\u003eEPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber engineered specifically for outdoor applications. Unlike PVC liners that can become brittle over time, EPDM remains pliable for decades — maintaining its watertight integrity through the harshest UK winters and hottest summers without cracking, splitting, or degrading.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eEPDM Rubber (Ethylene Propylene Diene Monomer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — lifetime stable, no degradation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — certified safe for all fish species and aquatic life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Guarantee on material\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation at Break\u003c\/td\u003e\n\u003ctd\u003e300%+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eExcellent — drapes and moulds to any pond contour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack (natural pond appearance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOzone\/Chemical Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for EPDM 0.75mm Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🌿 \u003cstrong\u003eWildlife Garden Ponds\u003c\/strong\u003e — Create a thriving habitat for frogs, newts, dragonflies and hedgehogs. 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Trim excess liner, leaving 30cm edge, and secure under coping stones or turf\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose EPDM Over PVC or HDPE?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs PVC:\u003c\/strong\u003e EPDM remains flexible indefinitely. PVC can become brittle after years of UV exposure. EPDM has a proven 40+ year lifespan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs HDPE:\u003c\/strong\u003e EPDM is far more flexible and easier to install in irregular pond shapes. EPDM joins can be cold-bonded with tape; HDPE requires heat welding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs Butyl:\u003c\/strong\u003e EPDM offers similar performance to Butyl at a more accessible price point — making it the top choice for value-conscious pond builders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Tested and approved safe for all fish species including koi and goldfish\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — Free delivery to all mainland UK addresses\u003c\/li\u003e\n\u003cli\u003e✅ Lifetime Guarantee — Manufacturer's lifetime guarantee on material integrity\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Call our pond specialists for free sizing and installation advice\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I calculate the liner size I need?\u003c\/strong\u003e\u003cbr\u003eA: Liner Length = Pond Length + (2 × Max Depth) + 0.6m; Liner Width = Pond Width + (2 × Max Depth) + 0.6m. 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Flexible, fish-safe, UV-resistant, and backed by a Lifetime Guarantee, this is the liner trusted by garden designers, pond contractors, and DIY enthusiasts across the United Kingdom.\u003c\/p\u003e\n\u003cp\u003eEPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber engineered specifically for outdoor applications. Unlike PVC liners that can become brittle over time, EPDM remains pliable for decades — maintaining its watertight integrity through the harshest UK winters and hottest summers without cracking, splitting, or degrading.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eEPDM Rubber (Ethylene Propylene Diene Monomer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — lifetime stable, no degradation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — certified safe for all fish species and aquatic life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Guarantee on material\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation at Break\u003c\/td\u003e\n\u003ctd\u003e300%+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eExcellent — drapes and moulds to any pond contour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack (natural pond appearance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOzone\/Chemical Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for EPDM 0.75mm Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🌿 \u003cstrong\u003eWildlife Garden Ponds\u003c\/strong\u003e — Create a thriving habitat for frogs, newts, dragonflies and hedgehogs. EPDM's flexible nature allows for gentle sloping edges that wildlife ponds require\u003c\/li\u003e\n\u003cli\u003e🐟 \u003cstrong\u003eGarden Koi Ponds\u003c\/strong\u003e — Safe for koi and goldfish; suitable for medium-sized koi ponds where 0.75mm provides excellent protection with proper underlay\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eStream Courses and Waterfalls\u003c\/strong\u003e — EPDM's flexibility allows it to be formed around complex stream courses, waterfalls, and cascades without creasing\u003c\/li\u003e\n\u003cli\u003e🌸 \u003cstrong\u003eFormal Ornamental Ponds\u003c\/strong\u003e — Clean black finish creates the reflective appearance preferred in formal garden design\u003c\/li\u003e\n\u003cli\u003e🌊 \u003cstrong\u003eLarge Natural Ponds\u003c\/strong\u003e — Available in large sizes with the ability to seam-weld multiple sheets for very large naturalistic pond designs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcavate and prepare\u003c\/strong\u003e — Dig your pond to desired shape, incorporating shelf areas at 25–30cm depth for marginal plants. Remove all stones, roots, and sharp debris from all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall underlay\u003c\/strong\u003e — Lay a 200gsm geotextile underlay before the EPDM liner — this is essential to protect the liner from punctures. Press flat against all surfaces with 30cm edge overlap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarm and position the liner\u003c\/strong\u003e — On a warm, sunny day, unfold the EPDM liner and allow it to warm for 30 minutes — warmer EPDM is more pliable and easier to mould. Centre over the pond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMould to shape\u003c\/strong\u003e — Gently press the liner into the pond contours, creating neat pleats at corners. Work from the centre outward. Do not stretch excessively\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFill and secure\u003c\/strong\u003e — Begin filling with water slowly. As weight builds, the liner will settle perfectly. Trim excess liner, leaving 30cm edge, and secure under coping stones or turf\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose EPDM Over PVC or HDPE?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs PVC:\u003c\/strong\u003e EPDM remains flexible indefinitely. PVC can become brittle after years of UV exposure. EPDM has a proven 40+ year lifespan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs HDPE:\u003c\/strong\u003e EPDM is far more flexible and easier to install in irregular pond shapes. EPDM joins can be cold-bonded with tape; HDPE requires heat welding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs Butyl:\u003c\/strong\u003e EPDM offers similar performance to Butyl at a more accessible price point — making it the top choice for value-conscious pond builders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Tested and approved safe for all fish species including koi and goldfish\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — Free delivery to all mainland UK addresses\u003c\/li\u003e\n\u003cli\u003e✅ Lifetime Guarantee — Manufacturer's lifetime guarantee on material integrity\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Call our pond specialists for free sizing and installation advice\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I calculate the liner size I need?\u003c\/strong\u003e\u003cbr\u003eA: Liner Length = Pond Length + (2 × Max Depth) + 0.6m; Liner Width = Pond Width + (2 × Max Depth) + 0.6m. 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Its unique molecular structure provides exceptional resistance to UV radiation, ozone, and extreme temperatures — maintaining its integrity long after lesser liner materials have failed.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eButyl Rubber (Isobutylene-Isoprene Rubber — IIR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-50°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eOutstanding — superior to all alternatives\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — certified, completely inert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Guarantee\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation at Break\u003c\/td\u003e\n\u003ctd\u003e400%+ (superior to EPDM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eSuperior — premium stretch and recovery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-Sealing\u003c\/td\u003e\n\u003ctd\u003eMinor punctures tend to self-seal under water pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOzone Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for Premium Butyl Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🏆 \u003cstrong\u003eShow-Quality Koi Ponds\u003c\/strong\u003e — Where fish values of thousands of pounds justify the very best liner material available\u003c\/li\u003e\n\u003cli\u003e🏛️ \u003cstrong\u003eFormal Architectural Water Features\u003c\/strong\u003e — Luxury garden designs by landscape architects specify Butyl for its premium credentials\u003c\/li\u003e\n\u003cli\u003e🌳 \u003cstrong\u003eEstate and Country Garden Ponds\u003c\/strong\u003e — Large ornamental ponds where quality is prioritised and replacement is not an option\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eComplex Water Features\u003c\/strong\u003e — Streams, cascades, and linked pond systems where superior flexibility is critical\u003c\/li\u003e\n\u003cli\u003e🦢 \u003cstrong\u003eLarge Wildlife Reserves\u003c\/strong\u003e — Commercial wildlife pond installations where long-term reliability is essential\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium ground preparation\u003c\/strong\u003e — Apply a 50–75mm sand layer to the base and compact smooth. Butyl's premium performance deserves a premium foundation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeotextile underlay is essential\u003c\/strong\u003e — Lay 200gsm geotextile underlay across all surfaces before the Butyl liner — non-negotiable for maximum liner lifespan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCareful unfolding\u003c\/strong\u003e — Butyl is heavier than EPDM and benefits from two-person handling on larger sizes. Unfold carefully on a warm day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm with care\u003c\/strong\u003e — Butyl's exceptional elasticity makes forming easy — it stretches readily to contours without stress marks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure permanently\u003c\/strong\u003e — Butyl edges can be bedded under coping stones, sealed with Butyl tape, or chemically bonded. Our technical team can advise on the best termination detail\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Butyl Is the Premium Choice\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e400%+ stretch — handles complex shapes and ground movement with ease\u003c\/li\u003e\n\u003cli\u003eProven 50+ year longevity in real-world installations\u003c\/li\u003e\n\u003cli\u003eSelf-sealing — minor punctures close under water pressure\u003c\/li\u003e\n\u003cli\u003eRemains flexible to -50°C — the best cold-weather performance of any pond liner\u003c\/li\u003e\n\u003cli\u003eSpecified in premium landscape architecture projects across the UK\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Completely inert, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ Lifetime Guarantee — Premium lifetime material warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Speak to our Butyl installation specialists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is Butyl worth the premium over EPDM?\u003c\/strong\u003e\u003cbr\u003eA: For high-value koi ponds, formal garden features, or installations where longevity over 50+ years is important, Butyl's superior elasticity and self-sealing properties make it worth the additional investment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I join two Butyl sheets for a large pond?\u003c\/strong\u003e\u003cbr\u003eA: Butyl sheets can be joined using specialist Butyl bonding tape and primer, creating a molecular bond as strong as the liner itself.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will Butyl liner affect water chemistry?\u003c\/strong\u003e\u003cbr\u003eA: No. Butyl is completely chemically inert. 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Flexible enough to mould to complex pond shapes, yet durable enough to provide long-term waterproofing, PVC pond liner is the choice of countless UK pond builders every year.\u003c\/p\u003e\n\u003cp\u003ePVC (Polyvinyl Chloride) pond liner has been used successfully in UK garden ponds for decades. Modern PVC pond liners are significantly improved over earlier generations — with enhanced UV stabilisers, plasticiser retention additives, and fish-safe formulations that address the limitations of older materials.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePolyvinyl Chloride (PVC) — UV stabilised\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.3mm–0.5mm (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-10°C to +60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eGood — UV stabilised formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — fish-safe plasticiser formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e15–30 Years (by grade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eGood — flexible, easy to handle and cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRepair\u003c\/td\u003e\n\u003ctd\u003eEasy — PVC repair tape or patch kits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eLighter than EPDM or Butyl — easy to handle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for PVC Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🌸 \u003cstrong\u003eOrnamental Garden Ponds\u003c\/strong\u003e — PVC provides reliable watertight containment for decorative garden ponds with goldfish and aquatic plants\u003c\/li\u003e\n\u003cli\u003e🐦 \u003cstrong\u003eWildlife Pond Installations\u003c\/strong\u003e — An affordable option for creating wildlife habitats — frogs, newts, and aquatic insects thrive with fish-safe PVC\u003c\/li\u003e\n\u003cli\u003e🌿 \u003cstrong\u003eRaised Pond Planters\u003c\/strong\u003e — PVC's lighter weight and ease of cutting makes it ideal for lining raised timber pond planters and containers\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eSmall Water Features\u003c\/strong\u003e — Bubble fountains, millstone features, and small rill channels are easily lined with flexible PVC\u003c\/li\u003e\n\u003cli\u003e🏠 \u003cstrong\u003eFirst Garden Ponds\u003c\/strong\u003e — An excellent starting point for first-time pond builders before investing in more expensive materials\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDig and prepare\u003c\/strong\u003e — Excavate your pond shape, removing all stones and sharp roots. Create a smooth surface — PVC benefits from thorough preparation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlways use underlay\u003c\/strong\u003e — Geotextile underlay is even more important with PVC than with thicker rubber liners. Lay 200gsm underlay across all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnfold and position\u003c\/strong\u003e — PVC is lightweight and easy to handle. Unfold over the pond in warm conditions and allow to drape naturally into shape\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm and fold\u003c\/strong\u003e — Gently press liner into pond contours. PVC folds more easily than rubber liners — use broad, flat folds at corners\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecure and fill\u003c\/strong\u003e — Fold edges under coping or turf and fill with water. PVC will settle into its final position as the pond fills\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose PVC?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eExcellent value — solid pond containment at the most accessible price in the flexible liner range\u003c\/li\u003e\n\u003cli\u003eEasy handling — lighter weight than rubber liners makes solo installation easier\u003c\/li\u003e\n\u003cli\u003eSimple repairs — PVC repair kits are inexpensive and easy to apply\u003c\/li\u003e\n\u003cli\u003eFish safe — modern fish-safe PVC formulations are safe for all common pond fish\u003c\/li\u003e\n\u003cli\u003eGood flexibility — flexible enough for most pond shapes in UK gardens\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Fish-safe plasticiser formulation, safe for all pond species\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 15–30 Year Guarantee — Solid medium-term material warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team can help you choose the right thickness and size\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long does PVC pond liner last compared to EPDM?\u003c\/strong\u003e\u003cbr\u003eA: Quality PVC pond liner installed with underlay typically lasts 15–20 years in UK conditions. EPDM has a longer proven lifespan of 40+ years. For long-term installations, EPDM is often the better investment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use PVC liner for a koi pond?\u003c\/strong\u003e\u003cbr\u003eA: PVC is fish-safe and suitable for koi in the short to medium term. For high-value koi collections, EPDM or Butyl is recommended for superior longevity and puncture resistance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I repair a PVC pond liner?\u003c\/strong\u003e\u003cbr\u003eA: PVC liner repairs are straightforward. For small punctures, PVC repair tape can be applied without draining the pond. For larger damage, a PVC patch kit with PVC solvent adhesive provides a permanent, watertight repair.\u003c\/p\u003e","brand":"Pond Liners Co","offers":[{"title":"2m x 3m \/ Without Underlay","offer_id":57664240943452,"sku":null,"price":89.98,"currency_code":"GBP","in_stock":true},{"title":"2m x 3m \/ With Underlay","offer_id":57664240976220,"sku":null,"price":161.22,"currency_code":"GBP","in_stock":true},{"title":"3m x 4m \/ Without Underlay","offer_id":57664241008988,"sku":null,"price":156.48,"currency_code":"GBP","in_stock":true},{"title":"3m x 4m \/ With Underlay","offer_id":57664241041756,"sku":null,"price":247.72,"currency_code":"GBP","in_stock":true},{"title":"3m x 5m \/ Without Underlay","offer_id":57664241074524,"sku":null,"price":195.47,"currency_code":"GBP","in_stock":true},{"title":"3m x 5m \/ With Underlay","offer_id":57664241107292,"sku":null,"price":300.46,"currency_code":"GBP","in_stock":true},{"title":"4m x 3.5m \/ Without 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| Fish Safe | Lifetime Guarantee","description":"\u003ch2\u003eEPDM Pond Liner 1.0mm Heavy Duty UK — Professional Grade | Fish Safe | Lifetime Guarantee\u003c\/h2\u003e\n\u003cp\u003eDemand professional-grade performance from your pond? Our \u003cstrong\u003e1.0mm Heavy Duty EPDM Pond Liner\u003c\/strong\u003e is the specification chosen by professional pond contractors, koi breeders, and serious pond enthusiasts across the UK. One-third thicker than standard pond liner, this is the ultimate in EPDM performance — delivering superior puncture resistance, maximum durability, and a lifetime of leak-free operation.\u003c\/p\u003e\n\u003cp\u003eWhen koi fish values, complex rockwork, or simply the desire for the absolute best motivate your pond build, 1.0mm EPDM is the answer. Its additional mass provides meaningful improvements in puncture resistance and longevity compared to standard 0.75mm liner, making it the professional's choice for ponds built to last generations.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eEPDM Rubber — Heavy Duty Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.0mm (33% thicker than standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — enhanced by greater material thickness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish\/Koi Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — certified, inert, non-toxic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Guarantee\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation at Break\u003c\/td\u003e\n\u003ctd\u003e300%+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePuncture Resistance\u003c\/td\u003e\n\u003ctd\u003eHeavy duty — significantly enhanced vs 0.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoot Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for 1.0mm Heavy Duty EPDM\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🐠 \u003cstrong\u003eShow Koi Ponds\u003c\/strong\u003e — Where fish values justify the very best materials. 1.0mm provides the security that serious koi collectors demand\u003c\/li\u003e\n\u003cli\u003e🪨 \u003cstrong\u003eRocky Gravel-Based Ponds\u003c\/strong\u003e — Where decorative cobbles, rockery, and gravel create additional puncture risk, extra thickness provides critical protection\u003c\/li\u003e\n\u003cli\u003e🏗️ \u003cstrong\u003eContractor-Built Ponds\u003c\/strong\u003e — 1.0mm is the standard specification for professionally installed ponds in landscaping contracts\u003c\/li\u003e\n\u003cli\u003e🌊 \u003cstrong\u003eLarge Volume Water Gardens\u003c\/strong\u003e — 10,000+ litre ponds where liner replacement would be enormously disruptive and expensive\u003c\/li\u003e\n\u003cli\u003e🏡 \u003cstrong\u003eLong-Term Legacy Ponds\u003c\/strong\u003e — Projects where the pond is intended to be a permanent garden feature for 50+ years\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProfessional Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare a perfect excavation\u003c\/strong\u003e — Apply a 50mm sand blinding layer to the base and firm it flat before proceeding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble-layer underlay\u003c\/strong\u003e — Use 200gsm geotextile underlay — consider double-layering at the base of deeper ponds for maximum protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAllow extended warm-up time\u003c\/strong\u003e — 1.0mm EPDM benefits from 45–60 minutes of sun exposure before forming the liner into the pond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional forming\u003c\/strong\u003e — Work methodically, forming the liner into corners with neat, tight pleats. The extra thickness holds its shape well once positioned correctly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermanent edge securing\u003c\/strong\u003e — Fold liner edge under concrete coping and bed in with mortar. Apply pond sealer to any concrete surfaces that will contact water\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose 1.0mm Over Standard 0.75mm?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e33% more material — significantly improved puncture and tear resistance\u003c\/li\u003e\n\u003cli\u003eProfessional specification — specified in professional landscaping contracts across the UK\u003c\/li\u003e\n\u003cli\u003eLonger lifespan — more material means slower UV degradation over decades\u003c\/li\u003e\n\u003cli\u003eKoi breeder's choice — the liner chosen by experienced koi keepers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Koi and goldfish safe, inert EPDM material\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK sizes delivered free\u003c\/li\u003e\n\u003cli\u003e✅ Lifetime Guarantee — Professional-grade lifetime liner warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Pond contractor and koi specialists on hand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I still need underlay with 1.0mm EPDM?\u003c\/strong\u003e\u003cbr\u003eA: Yes, always. 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Professional pond builders consider underlay non-negotiable: a pond liner without underlay is a pond liner waiting to fail.\u003c\/p\u003e\n\u003cp\u003eOur geotextile underlay is a heavy-duty 200gsm needle-punched polypropylene fabric — the same professional specification used in commercial reservoir lining, landscape drainage, and civil engineering projects. It acts as a cushion between the ground and your pond liner, absorbing the shock of stones, roots, and ground movement that would otherwise puncture or stress your investment over time.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eNeedle-punched polypropylene geotextile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e200gsm (grams per square metre)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003eApproximately 2mm uncompressed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-30°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eGood (protected by liner once installed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — inert polypropylene, non-toxic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e20 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eAll pond liner types: EPDM, Butyl, PVC, HDPE, LDPE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Permeability\u003c\/td\u003e\n\u003ctd\u003eHigh — allows drainage, does not trap water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eGrey\/Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Reasons Underlay Is Essential\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🛡️ \u003cstrong\u003eStone Puncture Protection\u003c\/strong\u003e — Even carefully prepared ground contains sharp stones that can work upward through soil movement. Underlay provides a tough buffer preventing these from reaching your liner\u003c\/li\u003e\n\u003cli\u003e🌱 \u003cstrong\u003eRoot Penetration Barrier\u003c\/strong\u003e — Aquatic plant roots can penetrate most liner materials over time. 200gsm geotextile significantly reduces this risk\u003c\/li\u003e\n\u003cli\u003e🌡️ \u003cstrong\u003eThermal Insulation\u003c\/strong\u003e — Provides a layer of insulation beneath the liner, helping maintain more stable water temperatures in winter\u003c\/li\u003e\n\u003cli\u003e⚡ \u003cstrong\u003eGround Movement Cushioning\u003c\/strong\u003e — Soils expand and contract with moisture changes and frost. Underlay absorbs this movement, preventing it from stressing the liner\u003c\/li\u003e\n\u003cli\u003e⏰ \u003cstrong\u003eExtended Liner Life\u003c\/strong\u003e — Pond liners installed with geotextile underlay last significantly longer than those without. The underlay investment pays for itself many times over\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcavate and clean\u003c\/strong\u003e — Dig your pond and remove all large stones, roots, glass, and sharp debris. The cleaner the substrate, the better\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll out the underlay\u003c\/strong\u003e — Starting from one end, roll the underlay fabric into the excavation and press flat against all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap at edges\u003c\/strong\u003e — Allow 30–40cm of underlay to extend beyond the pond edge in all directions, protecting the liner at its most vulnerable point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap joins\u003c\/strong\u003e — If multiple pieces are needed, overlap by at least 300mm. No adhesive needed — the liner weight holds all pieces in position\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall liner on top\u003c\/strong\u003e — Your chosen pond liner is installed directly on top of the underlay. The two layers work together to provide optimal protection\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eCompatible With All Pond Liner Types\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ EPDM Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ Butyl Rubber Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ PVC Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ HDPE Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ LDPE Pond Liner — all grades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Inert polypropylene, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 20 Year Guarantee — Long-term fabric warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team can help calculate the exact quantity needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I really need underlay, or can I use sand instead?\u003c\/strong\u003e\u003cbr\u003eA: Sand is a good supplement but not a replacement for geotextile underlay. 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Unlike PVC liners that can become brittle over time, EPDM remains pliable for decades — maintaining its watertight integrity through the harshest UK winters and hottest summers without cracking, splitting, or degrading.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eEPDM Rubber (Ethylene Propylene Diene Monomer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — lifetime stable, no degradation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — certified safe for all fish species and aquatic life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Guarantee on material\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation at Break\u003c\/td\u003e\n\u003ctd\u003e300%+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eExcellent — drapes and moulds to any pond contour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack (natural pond appearance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOzone\/Chemical Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for EPDM 0.75mm Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🌿 \u003cstrong\u003eWildlife Garden Ponds\u003c\/strong\u003e — Create a thriving habitat for frogs, newts, dragonflies and hedgehogs. EPDM's flexible nature allows for gentle sloping edges that wildlife ponds require\u003c\/li\u003e\n\u003cli\u003e🐟 \u003cstrong\u003eGarden Koi Ponds\u003c\/strong\u003e — Safe for koi and goldfish; suitable for medium-sized koi ponds where 0.75mm provides excellent protection with proper underlay\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eStream Courses and Waterfalls\u003c\/strong\u003e — EPDM's flexibility allows it to be formed around complex stream courses, waterfalls, and cascades without creasing\u003c\/li\u003e\n\u003cli\u003e🌸 \u003cstrong\u003eFormal Ornamental Ponds\u003c\/strong\u003e — Clean black finish creates the reflective appearance preferred in formal garden design\u003c\/li\u003e\n\u003cli\u003e🌊 \u003cstrong\u003eLarge Natural Ponds\u003c\/strong\u003e — Available in large sizes with the ability to seam-weld multiple sheets for very large naturalistic pond designs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcavate and prepare\u003c\/strong\u003e — Dig your pond to desired shape, incorporating shelf areas at 25–30cm depth for marginal plants. Remove all stones, roots, and sharp debris from all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall underlay\u003c\/strong\u003e — Lay a 200gsm geotextile underlay before the EPDM liner — this is essential to protect the liner from punctures. Press flat against all surfaces with 30cm edge overlap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarm and position the liner\u003c\/strong\u003e — On a warm, sunny day, unfold the EPDM liner and allow it to warm for 30 minutes — warmer EPDM is more pliable and easier to mould. Centre over the pond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMould to shape\u003c\/strong\u003e — Gently press the liner into the pond contours, creating neat pleats at corners. Work from the centre outward. Do not stretch excessively\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFill and secure\u003c\/strong\u003e — Begin filling with water slowly. As weight builds, the liner will settle perfectly. Trim excess liner, leaving 30cm edge, and secure under coping stones or turf\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose EPDM Over PVC or HDPE?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs PVC:\u003c\/strong\u003e EPDM remains flexible indefinitely. PVC can become brittle after years of UV exposure. EPDM has a proven 40+ year lifespan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs HDPE:\u003c\/strong\u003e EPDM is far more flexible and easier to install in irregular pond shapes. EPDM joins can be cold-bonded with tape; HDPE requires heat welding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs Butyl:\u003c\/strong\u003e EPDM offers similar performance to Butyl at a more accessible price point — making it the top choice for value-conscious pond builders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Tested and approved safe for all fish species including koi and goldfish\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — Free delivery to all mainland UK addresses\u003c\/li\u003e\n\u003cli\u003e✅ Lifetime Guarantee — Manufacturer's lifetime guarantee on material integrity\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Call our pond specialists for free sizing and installation advice\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I calculate the liner size I need?\u003c\/strong\u003e\u003cbr\u003eA: Liner Length = Pond Length + (2 × Max Depth) + 0.6m; Liner Width = Pond Width + (2 × Max Depth) + 0.6m. Always round up to the next available size.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can EPDM be repaired if it gets a puncture?\u003c\/strong\u003e\u003cbr\u003eA: Yes. EPDM is one of the easiest liner materials to repair. Small punctures can be patched with EPDM repair tape in under 30 minutes. The pond doesn't need to be fully drained for minor repairs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is EPDM safe for plants as well as fish?\u003c\/strong\u003e\u003cbr\u003eA: Absolutely. EPDM is 100% inert and does not leach any chemicals into the water. It is safe for fish, aquatic plants, amphibians, and all pond wildlife.\u003c\/p\u003e","brand":"PondLiners Co","offers":[{"title":"3m x 3m","offer_id":57665555956060,"sku":null,"price":220.99,"currency_code":"GBP","in_stock":true},{"title":"4m x 3m","offer_id":57665555988828,"sku":null,"price":295.99,"currency_code":"GBP","in_stock":true},{"title":"5m x 4m","offer_id":57665556021596,"sku":null,"price":490.99,"currency_code":"GBP","in_stock":true},{"title":"6m x 5m","offer_id":57665556054364,"sku":null,"price":735.99,"currency_code":"GBP","in_stock":true},{"title":"7m x 6m","offer_id":57665556087132,"sku":null,"price":1048.99,"currency_code":"GBP","in_stock":true},{"title":"8m x 6m","offer_id":57665556119900,"sku":null,"price":1176.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/62885eb06167f749d67b42cbcae602b1.jpg?v=1779040205"},{"product_id":"complete-pond-liner-kit-uk-butyl-0-75mm-geotextile-underlay-premium-bundle","title":"Complete Pond Liner Kit UK | Butyl 0.75mm + Geotextile Underlay | Premium Bundle","description":"\u003ch2\u003ePond Liner Underlay 200gsm UK — Heavy Duty Geotextile | Essential Protection | All Liner Types\u003c\/h2\u003e\n\u003cp\u003eThe single most important accessory for any pond liner installation — our \u003cstrong\u003e200gsm Heavy Duty Geotextile Pond Liner Underlay\u003c\/strong\u003e is the protective foundation that keeps your pond liner in perfect condition for decades. Professional pond builders consider underlay non-negotiable: a pond liner without underlay is a pond liner waiting to fail.\u003c\/p\u003e\n\u003cp\u003eOur geotextile underlay is a heavy-duty 200gsm needle-punched polypropylene fabric — the same professional specification used in commercial reservoir lining, landscape drainage, and civil engineering projects. It acts as a cushion between the ground and your pond liner, absorbing the shock of stones, roots, and ground movement that would otherwise puncture or stress your investment over time.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eNeedle-punched polypropylene geotextile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e200gsm (grams per square metre)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003eApproximately 2mm uncompressed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-30°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eGood (protected by liner once installed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — inert polypropylene, non-toxic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e20 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eAll pond liner types: EPDM, Butyl, PVC, HDPE, LDPE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Permeability\u003c\/td\u003e\n\u003ctd\u003eHigh — allows drainage, does not trap water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eGrey\/Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Reasons Underlay Is Essential\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🛡️ \u003cstrong\u003eStone Puncture Protection\u003c\/strong\u003e — Even carefully prepared ground contains sharp stones that can work upward through soil movement. Underlay provides a tough buffer preventing these from reaching your liner\u003c\/li\u003e\n\u003cli\u003e🌱 \u003cstrong\u003eRoot Penetration Barrier\u003c\/strong\u003e — Aquatic plant roots can penetrate most liner materials over time. 200gsm geotextile significantly reduces this risk\u003c\/li\u003e\n\u003cli\u003e🌡️ \u003cstrong\u003eThermal Insulation\u003c\/strong\u003e — Provides a layer of insulation beneath the liner, helping maintain more stable water temperatures in winter\u003c\/li\u003e\n\u003cli\u003e⚡ \u003cstrong\u003eGround Movement Cushioning\u003c\/strong\u003e — Soils expand and contract with moisture changes and frost. Underlay absorbs this movement, preventing it from stressing the liner\u003c\/li\u003e\n\u003cli\u003e⏰ \u003cstrong\u003eExtended Liner Life\u003c\/strong\u003e — Pond liners installed with geotextile underlay last significantly longer than those without. The underlay investment pays for itself many times over\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcavate and clean\u003c\/strong\u003e — Dig your pond and remove all large stones, roots, glass, and sharp debris. The cleaner the substrate, the better\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll out the underlay\u003c\/strong\u003e — Starting from one end, roll the underlay fabric into the excavation and press flat against all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap at edges\u003c\/strong\u003e — Allow 30–40cm of underlay to extend beyond the pond edge in all directions, protecting the liner at its most vulnerable point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap joins\u003c\/strong\u003e — If multiple pieces are needed, overlap by at least 300mm. No adhesive needed — the liner weight holds all pieces in position\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall liner on top\u003c\/strong\u003e — Your chosen pond liner is installed directly on top of the underlay. The two layers work together to provide optimal protection\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eCompatible With All Pond Liner Types\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ EPDM Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ Butyl Rubber Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ PVC Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ HDPE Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ LDPE Pond Liner — all grades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Inert polypropylene, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 20 Year Guarantee — Long-term fabric warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team can help calculate the exact quantity needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I really need underlay, or can I use sand instead?\u003c\/strong\u003e\u003cbr\u003eA: Sand is a good supplement but not a replacement for geotextile underlay. Sand can be washed away by water movement during pond filling, leaving voids that create pressure points. Use both sand (50mm base layer) AND geotextile underlay for the best protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How much underlay do I need?\u003c\/strong\u003e\u003cbr\u003eA: Order the same dimensions as your pond liner. Add 30–40cm on each dimension for edge overlap — or simply order the next size up if you're between sizes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can underlay be used for other applications?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Our 200gsm geotextile is widely used for weed suppression in garden borders, drainage separation layers in decking and paving projects, and erosion control on slopes.\u003c\/p\u003e","brand":"PondLiners Co","offers":[{"title":"3m x 3m","offer_id":57665556152668,"sku":null,"price":220.99,"currency_code":"GBP","in_stock":true},{"title":"4m x 3m","offer_id":57665556185436,"sku":null,"price":295.99,"currency_code":"GBP","in_stock":true},{"title":"5m x 4m","offer_id":57665556218204,"sku":null,"price":490.99,"currency_code":"GBP","in_stock":true},{"title":"6m x 5m","offer_id":57665556250972,"sku":null,"price":735.99,"currency_code":"GBP","in_stock":true},{"title":"7m x 6m","offer_id":57665556283740,"sku":null,"price":1048.99,"currency_code":"GBP","in_stock":true},{"title":"8m x 6m","offer_id":57665556316508,"sku":null,"price":1176.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/fb57e55f3a874139ca547731d6be61e4_1ea12475-cb90-4bb3-9bde-e67076ccade9.jpg?v=1779039634"},{"product_id":"epdm-pond-liner-geotextile-underlay-bundle-uk-0-75mm-fish-safe-complete-kit","title":"EPDM Pond Liner \u0026 Geotextile Underlay Bundle UK | 0.75mm Fish Safe | Complete Kit","description":"\u003ch2\u003eEPDM Rubber Pond Liner 0.75mm UK — Fish Safe | Lifetime Guarantee | Free UK Delivery\u003c\/h2\u003e\n\u003cp\u003eWhen it comes to pond liner materials, \u003cstrong\u003eEPDM rubber\u003c\/strong\u003e is the professional's first choice — and our \u003cstrong\u003e0.75mm EPDM Pond Liner\u003c\/strong\u003e is the UK's most popular choice for good reason. Flexible, fish-safe, UV-resistant, and backed by a Lifetime Guarantee, this is the liner trusted by garden designers, pond contractors, and DIY enthusiasts across the United Kingdom.\u003c\/p\u003e\n\u003cp\u003eEPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber engineered specifically for outdoor applications. Unlike PVC liners that can become brittle over time, EPDM remains pliable for decades — maintaining its watertight integrity through the harshest UK winters and hottest summers without cracking, splitting, or degrading.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eEPDM Rubber (Ethylene Propylene Diene Monomer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — lifetime stable, no degradation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — certified safe for all fish species and aquatic life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Guarantee on material\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation at Break\u003c\/td\u003e\n\u003ctd\u003e300%+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eExcellent — drapes and moulds to any pond contour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack (natural pond appearance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOzone\/Chemical Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for EPDM 0.75mm Pond Liner\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🌿 \u003cstrong\u003eWildlife Garden Ponds\u003c\/strong\u003e — Create a thriving habitat for frogs, newts, dragonflies and hedgehogs. EPDM's flexible nature allows for gentle sloping edges that wildlife ponds require\u003c\/li\u003e\n\u003cli\u003e🐟 \u003cstrong\u003eGarden Koi Ponds\u003c\/strong\u003e — Safe for koi and goldfish; suitable for medium-sized koi ponds where 0.75mm provides excellent protection with proper underlay\u003c\/li\u003e\n\u003cli\u003e💧 \u003cstrong\u003eStream Courses and Waterfalls\u003c\/strong\u003e — EPDM's flexibility allows it to be formed around complex stream courses, waterfalls, and cascades without creasing\u003c\/li\u003e\n\u003cli\u003e🌸 \u003cstrong\u003eFormal Ornamental Ponds\u003c\/strong\u003e — Clean black finish creates the reflective appearance preferred in formal garden design\u003c\/li\u003e\n\u003cli\u003e🌊 \u003cstrong\u003eLarge Natural Ponds\u003c\/strong\u003e — Available in large sizes with the ability to seam-weld multiple sheets for very large naturalistic pond designs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcavate and prepare\u003c\/strong\u003e — Dig your pond to desired shape, incorporating shelf areas at 25–30cm depth for marginal plants. Remove all stones, roots, and sharp debris from all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall underlay\u003c\/strong\u003e — Lay a 200gsm geotextile underlay before the EPDM liner — this is essential to protect the liner from punctures. Press flat against all surfaces with 30cm edge overlap\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarm and position the liner\u003c\/strong\u003e — On a warm, sunny day, unfold the EPDM liner and allow it to warm for 30 minutes — warmer EPDM is more pliable and easier to mould. Centre over the pond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMould to shape\u003c\/strong\u003e — Gently press the liner into the pond contours, creating neat pleats at corners. Work from the centre outward. Do not stretch excessively\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFill and secure\u003c\/strong\u003e — Begin filling with water slowly. As weight builds, the liner will settle perfectly. Trim excess liner, leaving 30cm edge, and secure under coping stones or turf\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose EPDM Over PVC or HDPE?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs PVC:\u003c\/strong\u003e EPDM remains flexible indefinitely. PVC can become brittle after years of UV exposure. EPDM has a proven 40+ year lifespan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs HDPE:\u003c\/strong\u003e EPDM is far more flexible and easier to install in irregular pond shapes. EPDM joins can be cold-bonded with tape; HDPE requires heat welding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs Butyl:\u003c\/strong\u003e EPDM offers similar performance to Butyl at a more accessible price point — making it the top choice for value-conscious pond builders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Tested and approved safe for all fish species including koi and goldfish\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — Free delivery to all mainland UK addresses\u003c\/li\u003e\n\u003cli\u003e✅ Lifetime Guarantee — Manufacturer's lifetime guarantee on material integrity\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Call our pond specialists for free sizing and installation advice\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I calculate the liner size I need?\u003c\/strong\u003e\u003cbr\u003eA: Liner Length = Pond Length + (2 × Max Depth) + 0.6m; Liner Width = Pond Width + (2 × Max Depth) + 0.6m. Always round up to the next available size.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can EPDM be repaired if it gets a puncture?\u003c\/strong\u003e\u003cbr\u003eA: Yes. EPDM is one of the easiest liner materials to repair. Small punctures can be patched with EPDM repair tape in under 30 minutes. The pond doesn't need to be fully drained for minor repairs.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is EPDM safe for plants as well as fish?\u003c\/strong\u003e\u003cbr\u003eA: Absolutely. EPDM is 100% inert and does not leach any chemicals into the water. It is safe for fish, aquatic plants, amphibians, and all pond wildlife.\u003c\/p\u003e","brand":"PondLiners Co","offers":[{"title":"3x3m","offer_id":57665828815196,"sku":null,"price":220.99,"currency_code":"GBP","in_stock":true},{"title":"4x3m","offer_id":57665828847964,"sku":null,"price":295.99,"currency_code":"GBP","in_stock":true},{"title":"5x4m","offer_id":57665828880732,"sku":null,"price":490.99,"currency_code":"GBP","in_stock":true},{"title":"6x5m","offer_id":57665828913500,"sku":null,"price":735.99,"currency_code":"GBP","in_stock":true},{"title":"7x6m","offer_id":57665828946268,"sku":null,"price":1048.99,"currency_code":"GBP","in_stock":true},{"title":"8x6m","offer_id":57665828979036,"sku":null,"price":1176.99,"currency_code":"GBP","in_stock":true},{"title":"10x8m","offer_id":57665829011804,"sku":null,"price":1969.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/55dcbe0d41ffe907c94cc51c4df7fcec.jpg?v=1779039650"},{"product_id":"butyl-pond-liner-underlay-bundle-uk-0-75mm-premium-grade-complete-kit","title":"Butyl Pond Liner \u0026 Underlay Bundle UK | 0.75mm Premium Grade | Complete Kit","description":"\u003ch2\u003ePond Liner Underlay 200gsm UK — Heavy Duty Geotextile | Essential Protection | All Liner Types\u003c\/h2\u003e\n\u003cp\u003eThe single most important accessory for any pond liner installation — our \u003cstrong\u003e200gsm Heavy Duty Geotextile Pond Liner Underlay\u003c\/strong\u003e is the protective foundation that keeps your pond liner in perfect condition for decades. Professional pond builders consider underlay non-negotiable: a pond liner without underlay is a pond liner waiting to fail.\u003c\/p\u003e\n\u003cp\u003eOur geotextile underlay is a heavy-duty 200gsm needle-punched polypropylene fabric — the same professional specification used in commercial reservoir lining, landscape drainage, and civil engineering projects. It acts as a cushion between the ground and your pond liner, absorbing the shock of stones, roots, and ground movement that would otherwise puncture or stress your investment over time.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eNeedle-punched polypropylene geotextile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e200gsm (grams per square metre)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003eApproximately 2mm uncompressed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-30°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eGood (protected by liner once installed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — inert polypropylene, non-toxic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e20 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eAll pond liner types: EPDM, Butyl, PVC, HDPE, LDPE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Permeability\u003c\/td\u003e\n\u003ctd\u003eHigh — allows drainage, does not trap water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eGrey\/Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Reasons Underlay Is Essential\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🛡️ \u003cstrong\u003eStone Puncture Protection\u003c\/strong\u003e — Even carefully prepared ground contains sharp stones that can work upward through soil movement. Underlay provides a tough buffer preventing these from reaching your liner\u003c\/li\u003e\n\u003cli\u003e🌱 \u003cstrong\u003eRoot Penetration Barrier\u003c\/strong\u003e — Aquatic plant roots can penetrate most liner materials over time. 200gsm geotextile significantly reduces this risk\u003c\/li\u003e\n\u003cli\u003e🌡️ \u003cstrong\u003eThermal Insulation\u003c\/strong\u003e — Provides a layer of insulation beneath the liner, helping maintain more stable water temperatures in winter\u003c\/li\u003e\n\u003cli\u003e⚡ \u003cstrong\u003eGround Movement Cushioning\u003c\/strong\u003e — Soils expand and contract with moisture changes and frost. Underlay absorbs this movement, preventing it from stressing the liner\u003c\/li\u003e\n\u003cli\u003e⏰ \u003cstrong\u003eExtended Liner Life\u003c\/strong\u003e — Pond liners installed with geotextile underlay last significantly longer than those without. The underlay investment pays for itself many times over\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcavate and clean\u003c\/strong\u003e — Dig your pond and remove all large stones, roots, glass, and sharp debris. The cleaner the substrate, the better\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll out the underlay\u003c\/strong\u003e — Starting from one end, roll the underlay fabric into the excavation and press flat against all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap at edges\u003c\/strong\u003e — Allow 30–40cm of underlay to extend beyond the pond edge in all directions, protecting the liner at its most vulnerable point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap joins\u003c\/strong\u003e — If multiple pieces are needed, overlap by at least 300mm. No adhesive needed — the liner weight holds all pieces in position\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall liner on top\u003c\/strong\u003e — Your chosen pond liner is installed directly on top of the underlay. The two layers work together to provide optimal protection\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eCompatible With All Pond Liner Types\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ EPDM Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ Butyl Rubber Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ PVC Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ HDPE Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ LDPE Pond Liner — all grades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Inert polypropylene, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 20 Year Guarantee — Long-term fabric warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team can help calculate the exact quantity needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I really need underlay, or can I use sand instead?\u003c\/strong\u003e\u003cbr\u003eA: Sand is a good supplement but not a replacement for geotextile underlay. Sand can be washed away by water movement during pond filling, leaving voids that create pressure points. Use both sand (50mm base layer) AND geotextile underlay for the best protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How much underlay do I need?\u003c\/strong\u003e\u003cbr\u003eA: Order the same dimensions as your pond liner. Add 30–40cm on each dimension for edge overlap — or simply order the next size up if you're between sizes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can underlay be used for other applications?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Our 200gsm geotextile is widely used for weed suppression in garden borders, drainage separation layers in decking and paving projects, and erosion control on slopes.\u003c\/p\u003e","brand":"PondLiners Co","offers":[{"title":"3x3m","offer_id":57665829044572,"sku":null,"price":220.99,"currency_code":"GBP","in_stock":true},{"title":"4x3m","offer_id":57665829077340,"sku":null,"price":295.99,"currency_code":"GBP","in_stock":true},{"title":"5x4m","offer_id":57665829110108,"sku":null,"price":490.99,"currency_code":"GBP","in_stock":true},{"title":"6x5m","offer_id":57665829142876,"sku":null,"price":735.99,"currency_code":"GBP","in_stock":true},{"title":"7x6m","offer_id":57665829175644,"sku":null,"price":1048.99,"currency_code":"GBP","in_stock":true},{"title":"8x6m","offer_id":57665829208412,"sku":null,"price":1176.99,"currency_code":"GBP","in_stock":true},{"title":"10x8m","offer_id":57665829241180,"sku":null,"price":1960.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/d5be1ff4b6309881a2a0cc1c5c1fab65.jpg?v=1779039528"},{"product_id":"koi-pond-professional-kit-uk-epdm-1-0mm-heavy-duty-premium-underlay","title":"Koi Pond Professional Kit UK | EPDM 1.0mm Heavy Duty + Premium Underlay","description":"\u003ch2\u003eEPDM Pond Liner 1.0mm Heavy Duty UK — Professional Grade | Fish Safe | Lifetime Guarantee\u003c\/h2\u003e\n\u003cp\u003eDemand professional-grade performance from your pond? Our \u003cstrong\u003e1.0mm Heavy Duty EPDM Pond Liner\u003c\/strong\u003e is the specification chosen by professional pond contractors, koi breeders, and serious pond enthusiasts across the UK. One-third thicker than standard pond liner, this is the ultimate in EPDM performance — delivering superior puncture resistance, maximum durability, and a lifetime of leak-free operation.\u003c\/p\u003e\n\u003cp\u003eWhen koi fish values, complex rockwork, or simply the desire for the absolute best motivate your pond build, 1.0mm EPDM is the answer. Its additional mass provides meaningful improvements in puncture resistance and longevity compared to standard 0.75mm liner, making it the professional's choice for ponds built to last generations.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eEPDM Rubber — Heavy Duty Grade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e1.0mm (33% thicker than standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent — enhanced by greater material thickness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish\/Koi Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — certified, inert, non-toxic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eLifetime Guarantee\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElongation at Break\u003c\/td\u003e\n\u003ctd\u003e300%+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePuncture Resistance\u003c\/td\u003e\n\u003ctd\u003eHeavy duty — significantly enhanced vs 0.75mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoot Resistance\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Use Cases for 1.0mm Heavy Duty EPDM\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🐠 \u003cstrong\u003eShow Koi Ponds\u003c\/strong\u003e — Where fish values justify the very best materials. 1.0mm provides the security that serious koi collectors demand\u003c\/li\u003e\n\u003cli\u003e🪨 \u003cstrong\u003eRocky Gravel-Based Ponds\u003c\/strong\u003e — Where decorative cobbles, rockery, and gravel create additional puncture risk, extra thickness provides critical protection\u003c\/li\u003e\n\u003cli\u003e🏗️ \u003cstrong\u003eContractor-Built Ponds\u003c\/strong\u003e — 1.0mm is the standard specification for professionally installed ponds in landscaping contracts\u003c\/li\u003e\n\u003cli\u003e🌊 \u003cstrong\u003eLarge Volume Water Gardens\u003c\/strong\u003e — 10,000+ litre ponds where liner replacement would be enormously disruptive and expensive\u003c\/li\u003e\n\u003cli\u003e🏡 \u003cstrong\u003eLong-Term Legacy Ponds\u003c\/strong\u003e — Projects where the pond is intended to be a permanent garden feature for 50+ years\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProfessional Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrepare a perfect excavation\u003c\/strong\u003e — Apply a 50mm sand blinding layer to the base and firm it flat before proceeding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDouble-layer underlay\u003c\/strong\u003e — Use 200gsm geotextile underlay — consider double-layering at the base of deeper ponds for maximum protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAllow extended warm-up time\u003c\/strong\u003e — 1.0mm EPDM benefits from 45–60 minutes of sun exposure before forming the liner into the pond\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional forming\u003c\/strong\u003e — Work methodically, forming the liner into corners with neat, tight pleats. The extra thickness holds its shape well once positioned correctly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePermanent edge securing\u003c\/strong\u003e — Fold liner edge under concrete coping and bed in with mortar. Apply pond sealer to any concrete surfaces that will contact water\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eWhy Choose 1.0mm Over Standard 0.75mm?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e33% more material — significantly improved puncture and tear resistance\u003c\/li\u003e\n\u003cli\u003eProfessional specification — specified in professional landscaping contracts across the UK\u003c\/li\u003e\n\u003cli\u003eLonger lifespan — more material means slower UV degradation over decades\u003c\/li\u003e\n\u003cli\u003eKoi breeder's choice — the liner chosen by experienced koi keepers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Koi and goldfish safe, inert EPDM material\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK sizes delivered free\u003c\/li\u003e\n\u003cli\u003e✅ Lifetime Guarantee — Professional-grade lifetime liner warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Pond contractor and koi specialists on hand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I still need underlay with 1.0mm EPDM?\u003c\/strong\u003e\u003cbr\u003eA: Yes, always. Even with the heavier 1.0mm liner, geotextile underlay is essential protection against stone punctures, root penetration, and ground movement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What's the difference between 0.75mm and 1.0mm EPDM in practice?\u003c\/strong\u003e\u003cbr\u003eA: The 1.0mm is noticeably heavier and thicker, providing improved puncture resistance. For koi ponds, ponds with rocky substrates, or where longevity is critical, 1.0mm is the recommended choice.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can 1.0mm EPDM be seam-welded for very large ponds?\u003c\/strong\u003e\u003cbr\u003eA: Yes. 1.0mm EPDM can be joined using cold-bond EPDM adhesive tape (preferred for DIY) or hot-air seam welding (professional). Contact our team for advice.\u003c\/p\u003e","brand":"PondLiners Co","offers":[{"title":"5x4m","offer_id":57665829405020,"sku":null,"price":293.22,"currency_code":"GBP","in_stock":true},{"title":"6x5m","offer_id":57665829437788,"sku":null,"price":439.83,"currency_code":"GBP","in_stock":true},{"title":"7x6m","offer_id":57665829470556,"sku":null,"price":615.76,"currency_code":"GBP","in_stock":true},{"title":"8x6m","offer_id":57665829503324,"sku":null,"price":703.73,"currency_code":"GBP","in_stock":true},{"title":"10x8m","offer_id":57665829536092,"sku":null,"price":1172.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/228bd893dcdab0bcb834f9748103ee9f.jpg?v=1779040001"},{"product_id":"budget-pond-liner-kit-uk-ldpe-liner-underlay-best-value-complete-kit","title":"Budget Pond Liner Kit UK | LDPE Liner + Underlay | Best Value Complete Kit","description":"\u003ch2\u003ePond Liner Underlay 200gsm UK — Heavy Duty Geotextile | Essential Protection | All Liner Types\u003c\/h2\u003e\n\u003cp\u003eThe single most important accessory for any pond liner installation — our \u003cstrong\u003e200gsm Heavy Duty Geotextile Pond Liner Underlay\u003c\/strong\u003e is the protective foundation that keeps your pond liner in perfect condition for decades. Professional pond builders consider underlay non-negotiable: a pond liner without underlay is a pond liner waiting to fail.\u003c\/p\u003e\n\u003cp\u003eOur geotextile underlay is a heavy-duty 200gsm needle-punched polypropylene fabric — the same professional specification used in commercial reservoir lining, landscape drainage, and civil engineering projects. It acts as a cushion between the ground and your pond liner, absorbing the shock of stones, roots, and ground movement that would otherwise puncture or stress your investment over time.\u003c\/p\u003e\n\u003ch3\u003eFull Technical Specifications\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003ctr\u003e\n\u003cth\u003eProperty\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eNeedle-punched polypropylene geotextile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e200gsm (grams per square metre)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003eApproximately 2mm uncompressed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-30°C to +70°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eGood (protected by liner once installed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003e✅ Yes — inert polypropylene, non-toxic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e20 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eAll pond liner types: EPDM, Butyl, PVC, HDPE, LDPE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Permeability\u003c\/td\u003e\n\u003ctd\u003eHigh — allows drainage, does not trap water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eGrey\/Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003e5 Reasons Underlay Is Essential\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🛡️ \u003cstrong\u003eStone Puncture Protection\u003c\/strong\u003e — Even carefully prepared ground contains sharp stones that can work upward through soil movement. Underlay provides a tough buffer preventing these from reaching your liner\u003c\/li\u003e\n\u003cli\u003e🌱 \u003cstrong\u003eRoot Penetration Barrier\u003c\/strong\u003e — Aquatic plant roots can penetrate most liner materials over time. 200gsm geotextile significantly reduces this risk\u003c\/li\u003e\n\u003cli\u003e🌡️ \u003cstrong\u003eThermal Insulation\u003c\/strong\u003e — Provides a layer of insulation beneath the liner, helping maintain more stable water temperatures in winter\u003c\/li\u003e\n\u003cli\u003e⚡ \u003cstrong\u003eGround Movement Cushioning\u003c\/strong\u003e — Soils expand and contract with moisture changes and frost. Underlay absorbs this movement, preventing it from stressing the liner\u003c\/li\u003e\n\u003cli\u003e⏰ \u003cstrong\u003eExtended Liner Life\u003c\/strong\u003e — Pond liners installed with geotextile underlay last significantly longer than those without. The underlay investment pays for itself many times over\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStep-by-Step Installation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcavate and clean\u003c\/strong\u003e — Dig your pond and remove all large stones, roots, glass, and sharp debris. The cleaner the substrate, the better\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoll out the underlay\u003c\/strong\u003e — Starting from one end, roll the underlay fabric into the excavation and press flat against all surfaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap at edges\u003c\/strong\u003e — Allow 30–40cm of underlay to extend beyond the pond edge in all directions, protecting the liner at its most vulnerable point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverlap joins\u003c\/strong\u003e — If multiple pieces are needed, overlap by at least 300mm. No adhesive needed — the liner weight holds all pieces in position\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall liner on top\u003c\/strong\u003e — Your chosen pond liner is installed directly on top of the underlay. The two layers work together to provide optimal protection\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eCompatible With All Pond Liner Types\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ EPDM Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ Butyl Rubber Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ PVC Pond Liner — all thicknesses\u003c\/li\u003e\n\u003cli\u003e✅ HDPE Pond Liner — all grades\u003c\/li\u003e\n\u003cli\u003e✅ LDPE Pond Liner — all grades\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✅ Trust \u0026amp; Guarantee\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Fish Safe Certified — Inert polypropylene, safe for all aquatic life\u003c\/li\u003e\n\u003cli\u003e✅ Free UK Delivery — All mainland UK orders delivered free\u003c\/li\u003e\n\u003cli\u003e✅ 20 Year Guarantee — Long-term fabric warranty\u003c\/li\u003e\n\u003cli\u003e✅ Expert Advice Available — Our team can help calculate the exact quantity needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I really need underlay, or can I use sand instead?\u003c\/strong\u003e\u003cbr\u003eA: Sand is a good supplement but not a replacement for geotextile underlay. Sand can be washed away by water movement during pond filling, leaving voids that create pressure points. Use both sand (50mm base layer) AND geotextile underlay for the best protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How much underlay do I need?\u003c\/strong\u003e\u003cbr\u003eA: Order the same dimensions as your pond liner. Add 30–40cm on each dimension for edge overlap — or simply order the next size up if you're between sizes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can underlay be used for other applications?\u003c\/strong\u003e\u003cbr\u003eA: Yes. Our 200gsm geotextile is widely used for weed suppression in garden borders, drainage separation layers in decking and paving projects, and erosion control on slopes.\u003c\/p\u003e","brand":"PondLiners Co","offers":[{"title":"3x3m","offer_id":57665829568860,"sku":null,"price":46.9,"currency_code":"GBP","in_stock":true},{"title":"4x3m","offer_id":57665829601628,"sku":null,"price":62.53,"currency_code":"GBP","in_stock":true},{"title":"5x4m","offer_id":57665829634396,"sku":null,"price":104.22,"currency_code":"GBP","in_stock":true},{"title":"6x5m","offer_id":57665829667164,"sku":null,"price":156.33,"currency_code":"GBP","in_stock":true},{"title":"6x6m","offer_id":57665829699932,"sku":null,"price":187.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/fb57e55f3a874139ca547731d6be61e4.jpg?v=1779039518"},{"product_id":"hdpe-pond-liner-uk-0-35mm-uv-resistant-25-year-guarantee-fish-safe","title":"HDPE Pond Liner UK | 0.35mm UV Resistant | 25 Year Guarantee | Fish Safe","description":"\u003cdiv class=\"product-description\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eBuilt to last a lifetime in British gardens\u003c\/strong\u003e, this premium 0.35mm HDPE pond liner delivers professional-grade waterproofing for ponds of all shapes and sizes. Whether you're constructing a koi pond, wildlife pond, or ornamental water feature, this UV-resistant high-density polyethylene membrane provides the reliable, long-term protection your pond deserves — backed by an industry-leading \u003cstrong\u003e25-year UV guarantee\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eMade from 100% virgin HDPE materials, this liner is \u003cstrong\u003ecertified fish safe\u003c\/strong\u003e and free from harmful plasticisers, making it the responsible choice for ponds housing koi, goldfish, or supporting British wildlife. Its 0.35mm thickness strikes the perfect balance between durability and flexibility, allowing it to conform to irregular pond shapes, shelves, and contours with ease during installation.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width:100%; border-collapse:collapse; font-size:14px;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHDPE (High-Density Polyethylene)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMaterial Grade\u003c\/td\u003e\n\u003ctd\u003e100% Virgin Materials\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.35mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eYes — UV stabilised\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e25 years against UV damage\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003eYes — non-toxic, aquatically safe\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eStretchability\u003c\/td\u003e\n\u003ctd\u003eNo stretch — maintains shape under pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSuppleness\u003c\/td\u003e\n\u003ctd\u003eVery supple — easy to fold and position\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003eKoi ponds, wildlife ponds, ornamental ponds, water features\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eUnderlay Required\u003c\/td\u003e\n\u003ctd\u003eRecommended (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e0.35mm HDPE\u003c\/strong\u003e — industry-standard thickness for flexible pond liners\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e25-Year UV Guarantee\u003c\/strong\u003e — long-term protection against sun degradation\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFish Safe \u0026amp; Wildlife Safe\u003c\/strong\u003e — 100% non-toxic formulation\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eUV Stabilised\u003c\/strong\u003e — resists fading and brittleness in British weather\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eVery Supple\u003c\/strong\u003e — easily folds around shelves, corners, and contours\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e100% Virgin HDPE\u003c\/strong\u003e — no recycled fillers, consistent quality throughout\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003ePre-cut to size\u003c\/strong\u003e — ready to install straight from the pack\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFree UK Delivery\u003c\/strong\u003e — delivered to your door\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003cp\u003eThis HDPE liner is suitable for a wide range of pond and water feature projects:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKoi Ponds\u003c\/strong\u003e — safe for koi and ornamental fish; smooth surface won't harbour harmful bacteria\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWildlife Ponds\u003c\/strong\u003e — supports frogs, newts, hedgehogs, and pond life without chemical leaching\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGarden Ponds\u003c\/strong\u003e — suitable for formal and informal pond designs of all shapes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRaised Ponds\u003c\/strong\u003e — can be used with timber, stone or block raised pond structures\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStream \u0026amp; Bog Gardens\u003c\/strong\u003e — flexible enough for watercourse and bog garden applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWater Features\u003c\/strong\u003e — fountains, waterfalls, and decorative water displays\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Tips\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize calculation:\u003c\/strong\u003e Liner size = pond length + (2 × depth) + 0.5m overlap each end. Use our pond liner size guide if unsure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrepare the ground:\u003c\/strong\u003e Remove all sharp stones, roots, and debris. Use sand or a protective underlay (recommended) to prevent punctures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLay the liner:\u003c\/strong\u003e Drape loosely into the pond on a warm day (HDPE becomes more pliable in warmth). Work from the centre outward, pleating the liner into corners.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFill gradually:\u003c\/strong\u003e Fill with water slowly, easing the liner into position as the weight settles it.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrim and secure:\u003c\/strong\u003e Leave at least 200–300mm overlap around the edge. Trim excess and secure with edging stones or coping.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eWhy Choose Our HDPE Pond Liner?\u003c\/h2\u003e\n\u003cp\u003eWith \u003cstrong\u003eover 4,000 five-star reviews\u003c\/strong\u003e from UK pond builders, this is one of Britain's best-selling pond liners — and for good reason. The combination of UV resistance, fish-safe certification, and the 25-year guarantee makes it an outstanding investment for any pond project. Unlike cheaper PVC alternatives, HDPE doesn't contain plasticisers that can leach into water and harm aquatic life.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e🐟 Fish Safe Certified\u003c\/strong\u003e | \u003cstrong\u003e☀️ UV Resistant\u003c\/strong\u003e | \u003cstrong\u003e📅 25 Year Guarantee\u003c\/strong\u003e | \u003cstrong\u003e🚚 Free UK Delivery\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Pond Liners Co","offers":[{"title":"3m x 2.5m","offer_id":57666513011036,"sku":null,"price":25.42,"currency_code":"GBP","in_stock":true},{"title":"4m x 3m","offer_id":57666513043804,"sku":null,"price":40.67,"currency_code":"GBP","in_stock":true},{"title":"4m x 5m","offer_id":57666513076572,"sku":null,"price":67.78,"currency_code":"GBP","in_stock":true},{"title":"5m x 5m","offer_id":57666513109340,"sku":null,"price":84.72,"currency_code":"GBP","in_stock":true},{"title":"5m x 7m","offer_id":57666513142108,"sku":null,"price":118.62,"currency_code":"GBP","in_stock":true},{"title":"6m x 6m","offer_id":57666513174876,"sku":null,"price":122.0,"currency_code":"GBP","in_stock":true},{"title":"6m x 8m","offer_id":57666513207644,"sku":null,"price":162.67,"currency_code":"GBP","in_stock":true},{"title":"8m x 10m","offer_id":57666513240412,"sku":null,"price":271.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/7a831f4b720515d0700c27046d16144a.jpg?v=1779039834"},{"product_id":"flexible-ldpe-pond-liner-uk-0-3mm-uv-resistant-koi-wildlife-ponds","title":"Flexible LDPE Pond Liner UK | 0.3mm | UV Resistant | Koi \u0026 Wildlife Ponds","description":"\u003cdiv class=\"product-description\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eFlexible LDPE Pond Liner\u003c\/strong\u003e is the go-to choice for UK pond builders who need an easy-to-handle, budget-friendly liner that doesn't compromise on performance. Made from 0.3mm low-density polyethylene, this liner is naturally \u003cstrong\u003emore flexible and lightweight\u003c\/strong\u003e than HDPE alternatives, making it ideal for hobbyists and those installing their first pond. It comes \u003cstrong\u003efish safe certified\u003c\/strong\u003e, UV resistant, and backed by a \u003cstrong\u003e25-year guarantee\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're creating a small wildlife pond in a city garden or a larger ornamental koi pond, this LDPE liner adapts effortlessly to your design. The flexible material drapes easily around curves, shelves, and irregular pond shapes, reducing the risk of creases and folds during installation.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width:100%; border-collapse:collapse; font-size:14px;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eLDPE (Low-Density Polyethylene)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eYes — UV stabilised\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003e25 years against UV damage\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003eYes — aquatically non-toxic\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eHigh — drapes easily into pond contours\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCut-to-size\u003c\/td\u003e\n\u003ctd\u003eEasy to trim with scissors or knife\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSuitable For\u003c\/td\u003e\n\u003ctd\u003eKoi ponds, wildlife ponds, ornamental water features\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e0.3mm LDPE\u003c\/strong\u003e — highly flexible, easy to position and install\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003e25-Year UV Guarantee\u003c\/strong\u003e — resists sun damage in all British weather\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFish \u0026amp; Wildlife Safe\u003c\/strong\u003e — certified non-toxic formulation\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eEasy to Cut\u003c\/strong\u003e — trims cleanly with standard scissors or a utility knife\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eMultiple Sizes\u003c\/strong\u003e — from small 2x2m up to large 6x5m sheets\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eLightweight\u003c\/strong\u003e — easier to transport and handle than heavier rubber liners\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFree UK Delivery\u003c\/strong\u003e — fast dispatch to your door\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWildlife Ponds\u003c\/strong\u003e — safe for frogs, newts, toads, hedgehogs, and birds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKoi \u0026amp; Goldfish Ponds\u003c\/strong\u003e — non-toxic surface safe for ornamental fish\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBeginner Pond Builds\u003c\/strong\u003e — easy to work with, forgiving during installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInformal Garden Ponds\u003c\/strong\u003e — adapts to any organic, free-form shape\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBog Gardens\u003c\/strong\u003e — retains moisture for marginal pond plants\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePond Repairs\u003c\/strong\u003e — can be used as patching material over existing liners\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eLDPE vs HDPE — Which Should I Choose?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eLDPE (this liner)\u003c\/strong\u003e is more flexible and easier to handle, making it excellent for complex shapes and first-time builders. It's slightly thinner than HDPE at 0.3mm but still durable enough for long-term use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHDPE\u003c\/strong\u003e is denser and more puncture-resistant, better suited to larger ponds or areas with aggressive root systems. Both materials are fish safe and UV resistant.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasure:\u003c\/strong\u003e Length + (2 × max depth) + 0.6m × Width + (2 × max depth) + 0.6m\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrepare:\u003c\/strong\u003e Remove sharp stones and roots. Sand base recommended. Protective underlay advised.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarm the liner:\u003c\/strong\u003e On a sunny day, LDPE becomes even more pliable — ideal for installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrape and fold:\u003c\/strong\u003e Work from the centre out, neatly folding liner into corners and shelves.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFill slowly:\u003c\/strong\u003e Add water gradually — the weight helps settle the liner into position.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecure edges:\u003c\/strong\u003e Trim with 200–300mm overlap and secure under coping stones or soil.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eWith Over 1,400 Five-Star Reviews\u003c\/h2\u003e\n\u003cp\u003eThis LDPE liner is one of the UK's most popular pond membranes — trusted by hobbyist pond builders, garden landscapers, and wildlife garden enthusiasts across Britain. The combination of easy handling, UV stability, fish-safe formulation, and long guarantee makes it exceptional value for money.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e🐟 Fish Safe\u003c\/strong\u003e | \u003cstrong\u003e☀️ UV Resistant\u003c\/strong\u003e | \u003cstrong\u003e📅 25 Year Guarantee\u003c\/strong\u003e | \u003cstrong\u003e✂️ Easy to Cut\u003c\/strong\u003e | \u003cstrong\u003e🚚 Free UK Delivery\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Pond Liners Co","offers":[{"title":"2m x 2m","offer_id":57666515239260,"sku":null,"price":19.33,"currency_code":"GBP","in_stock":true},{"title":"3m x 3m","offer_id":57666515272028,"sku":null,"price":43.48,"currency_code":"GBP","in_stock":true},{"title":"4m x 3m","offer_id":57666515304796,"sku":null,"price":57.98,"currency_code":"GBP","in_stock":true},{"title":"4m x 4m","offer_id":57666515337564,"sku":null,"price":77.31,"currency_code":"GBP","in_stock":true},{"title":"6m x 5m","offer_id":57666515370332,"sku":null,"price":144.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/63bf30658288b7abc1d5dc5429c783e4.jpg?v=1779039725"},{"product_id":"small-garden-pond-liner-uk-heavy-duty-black-membrane-fish-safe","title":"Small Garden Pond Liner UK | Heavy Duty Black Membrane | Fish Safe","description":"\u003cdiv class=\"product-description\"\u003e\n\n\u003cp\u003ePerfect for small garden ponds, container water features, and compact wildlife ponds — this \u003cstrong\u003eheavy-duty black pond liner\u003c\/strong\u003e delivers reliable waterproofing in a compact, easy-to-handle format. Constructed from durable 0.2mm black membrane material, this liner is \u003cstrong\u003efish safe, seamless, and UV stabilised\u003c\/strong\u003e for long-lasting performance even in British garden conditions.\u003c\/p\u003e\n\n\u003cp\u003eAvailable in two compact sizes (2x2m and 2x3m), this liner is ideal for urban gardens, patio ponds, and anyone constructing a small feature pond for the first time. The lightweight yet robust construction makes it straightforward to position, trim, and secure — even for first-time pond builders.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"width:100%; border-collapse:collapse; font-size:14px;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHDPE\/PVC Black Membrane\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eThickness\u003c\/td\u003e\n\u003ctd\u003e0.2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eSeamless — no joins or weak points\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eUV Resistance\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFish Safe\u003c\/td\u003e\n\u003ctd\u003eYes — non-toxic formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eFlexibility\u003c\/td\u003e\n\u003ctd\u003eHigh — easy to fit irregular shapes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSizes Available\u003c\/td\u003e\n\u003ctd\u003e2m × 2m, 2m × 3m\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eIdeal For\u003c\/td\u003e\n\u003ctd\u003eSmall ponds, container ponds, patio water features\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eSeamless construction\u003c\/strong\u003e — no joins means no weak points or potential leak sites\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFish Safe \u0026amp; Wildlife Safe\u003c\/strong\u003e — certified non-toxic, safe for pond life\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eUV Stabilised\u003c\/strong\u003e — resists British sun and weather conditions\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eHeavy duty black membrane\u003c\/strong\u003e — blends naturally with pond environment\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eEasy to cut and trim\u003c\/strong\u003e — standard scissors or utility knife\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eLightweight\u003c\/strong\u003e — easy to carry and install single-handed\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eGreat value for small ponds\u003c\/strong\u003e — no need to buy oversized liner\u003c\/li\u003e\n  \u003cli\u003e✅ \u003cstrong\u003eFree UK Delivery\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmall garden ponds\u003c\/strong\u003e — up to approximately 1m × 1m (allowing for depth and overlap)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWildlife ponds\u003c\/strong\u003e — encourage frogs, newts and beneficial insects\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePatio ponds\u003c\/strong\u003e — for raised wooden, stone or block built mini-ponds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContainer ponds\u003c\/strong\u003e — line a half barrel, trough or raised planter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBog garden sections\u003c\/strong\u003e — retain moisture for marginal planting areas\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChild-safe ponds\u003c\/strong\u003e — small shallow ponds are safer and easier to maintain\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSize Guide\u003c\/h2\u003e\n\u003cp\u003eTo calculate the liner size you need:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLiner length = pond length + (2 × max depth) + 0.5m\u003c\/li\u003e\n  \u003cli\u003eLiner width = pond width + (2 × max depth) + 0.5m\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor example, a 1m × 1m pond with 0.5m depth needs approximately a 2.5m × 2.5m liner — so the 2m × 2m is ideal for very shallow ponds or the 2m × 3m if you need a little more depth or width flexibility.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Tips for Small Ponds\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDig your pond shape and remove all sharp stones and roots\u003c\/li\u003e\n  \u003cli\u003eAdd a layer of sand (25–50mm) to protect the liner base\u003c\/li\u003e\n  \u003cli\u003eLay the liner loosely, working from centre to edges\u003c\/li\u003e\n  \u003cli\u003eFill slowly with water — the weight helps the liner settle\u003c\/li\u003e\n  \u003cli\u003eTrim excess, leaving 150–200mm overlap around the rim\u003c\/li\u003e\n  \u003cli\u003eSecure under turf, decking, paving slabs or decorative stones\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eWith \u003cstrong\u003e733+ verified reviews\u003c\/strong\u003e from UK customers, this small pond liner is a proven bestseller for compact garden water features. Ideal for first-time pond builders wanting reliable results without overspending.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e🐟 Fish Safe\u003c\/strong\u003e | \u003cstrong\u003e☀️ UV Resistant\u003c\/strong\u003e | \u003cstrong\u003e💧 Seamless\u003c\/strong\u003e | \u003cstrong\u003e🌿 Wildlife Friendly\u003c\/strong\u003e | \u003cstrong\u003e🚚 Free UK Delivery\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003c\/div\u003e","brand":"Pond Liners Co","offers":[{"title":"2m x 2m","offer_id":57666515435868,"sku":null,"price":25.98,"currency_code":"GBP","in_stock":true},{"title":"2m x 3m","offer_id":57666515468636,"sku":null,"price":38.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0889\/2035\/9260\/files\/cd22e4bd2b0c0459287d5ddab54fddb3.jpg?v=1779040452"}],"url":"https:\/\/www.pondlinersco.co.uk\/collections\/pond-liners.oembed?page=2","provider":"PondLinersco.co.uk","version":"1.0","type":"link"}