{"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","url":"https:\/\/www.pondlinersco.co.uk\/products\/hdpe-pond-liner-uk-0-35mm-uv-resistant-25-year-guarantee-fish-safe","provider":"PondLinersco.co.uk","version":"1.0","type":"link"}