{"product_id":"box-welded-pond-liner","title":"Box Welded Liner 1mm Butyl - Create your own","description":"\u003cp\u003e\u003cstrong\u003eThe go-to pond liner for serious water gardeners — trusted for decades, backed by a 25-year guarantee.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen it comes to creating the perfect koi pond or water feature, there's one material professionals keep coming back to: \u003cstrong\u003e1mm butyl rubber\u003c\/strong\u003e. Our Custom Box Welded Butyl Pond Liners are precision-engineered to the exact dimensions of your pond, delivering a flawless, fold-free finish that standard flat liners simply can't match.\u003c\/p\u003e\n\u003cp\u003eButyl rubber has been the benchmark in pond lining for over 40 years — recommended by leading European water gardening experts and installed in hundreds of thousands of ponds across the world. Its unrivalled elasticity, UV stability, and resistance to temperature extremes make it the undisputed choice for long-lasting, low-maintenance pond construction.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose Our 1mm Butyl Box Welded Pond Liner?\u003c\/h2\u003e\n\u003ch3\u003ePrecision-Made to Your Dimensions\u003c\/h3\u003e\n\u003cp\u003eEvery liner is produced to order, cut and welded exactly to your specified measurements. No awkward folds, no guesswork — just a perfect fit from day one.\u003c\/p\u003e\n\u003ch3\u003eFully Welded Corners \u0026amp; Flanges — No Site Joins Required\u003c\/h3\u003e\n\u003cp\u003eOur box welded construction means all corners and top lip flanges are factory-welded to a professional standard, eliminating the risk of on-site leaks. A standard top flange is included as default (specify your flange size, or enter 0mm if not required).\u003c\/p\u003e\n\u003ch3\u003eDurability You Can Rely On\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigher UV stability — won't degrade in sunlight\u003c\/li\u003e\n\u003cli\u003eUnaffected by temperature extremes, age, or ground movement\u003c\/li\u003e\n\u003cli\u003eResists compressive loads and adapts to the substrate\u003c\/li\u003e\n\u003cli\u003eSuperior tear and tensile strength versus EPDM and PVC alternatives\u003c\/li\u003e\n\u003cli\u003eDoes not shrink, lose weight, or become brittle over time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChemically Safe \u0026amp; Pond Life Friendly\u003c\/h3\u003e\n\u003cp\u003eOur 1mm butyl liner contains \u003cstrong\u003eno plasticisers or additives\u003c\/strong\u003e — meaning zero leaching into your water. Completely safe for fish, plants, and all aquatic life. Chemically stable when in contact with soil chemicals and surrounding materials.\u003c\/p\u003e\n\u003ch3\u003eRelaxed Fit Installation\u003c\/h3\u003e\n\u003cp\u003eUnlike stretch-to-fit alternatives, our box welded liners are designed to sit with a relaxed fit — no stress on the material, no weak points, and maximum long-term life expectancy.\u003c\/p\u003e\n\u003ch3\u003eCan Be Vulcanised\u003c\/h3\u003e\n\u003cp\u003eNeed to extend or repair? Butyl rubber can be vulcanised, making future modifications straightforward and preserving the integrity of the liner throughout its lifetime.\u003c\/p\u003e\n\u003ch2\u003eProfessional Grade Underlay — Don't Risk Your Warranty\u003c\/h2\u003e\n\u003cp\u003eWhen placing your order, you'll be asked whether you'd like to add our \u003cstrong\u003eprofessional grade 260gsm geotextile underlay\u003c\/strong\u003e. This isn't an optional extra to skip lightly — \u003cstrong\u003efailure to use an underlay will invalidate your 25-year guarantee.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOur 260gsm underlay is specifically selected to provide a robust protective layer between your butyl liner and the pond structure, guarding against:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePuncture from sharp stones, grit, or aggregate\u003c\/li\u003e\n\u003cli\u003eRoot penetration over time\u003c\/li\u003e\n\u003cli\u003eAbrasion from rough concrete or block surfaces\u003c\/li\u003e\n\u003cli\u003eGround movement stress on the liner base\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFitting the underlay takes minutes and adds years to the life of your liner. \u003cstrong\u003eWe strongly recommend selecting Yes when prompted at checkout.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003e25-Year Guarantee — Buy Once, Build for Life\u003c\/h2\u003e\n\u003cp\u003eWe stand behind the quality of our butyl pond liners with a comprehensive \u003cstrong\u003e25-year guarantee\u003c\/strong\u003e. To keep your guarantee valid, your liner must be installed with our professional grade 260gsm geotextile underlay. When you invest in a box welded butyl liner — and protect it correctly — you're investing in a pond that will serve you for generations.\u003c\/p\u003e\n\u003ch2\u003eQuick Installation, Long-Term Performance\u003c\/h2\u003e\n\u003cp\u003eDesigned to be installed into concrete block or timber pond structures, our box welded liners make installation quick and straightforward — simply lower into position and secure. No specialist skills required, no site joining, and no stress.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Use:\u003c\/strong\u003e Concrete block, timber frame, or raised pond structures. Not intended as a standalone tank.\u003c\/p\u003e\n\u003ch2\u003eKey Features at a Glance\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1mm premium butyl rubber construction\u003c\/li\u003e\n\u003cli\u003eMade-to-measure to your exact pond dimensions\u003c\/li\u003e\n\u003cli\u003eFully welded corners and flanges — zero site joins\u003c\/li\u003e\n\u003cli\u003ePerfect fold-free fit into your pond\u003c\/li\u003e\n\u003cli\u003eUV stable, temperature resistant, and age-resistant\u003c\/li\u003e\n\u003cli\u003eNo plasticisers — safe for fish and plants\u003c\/li\u003e\n\u003cli\u003eSuperior tear and tensile strength\u003c\/li\u003e\n\u003cli\u003eCan be vulcanised for future repairs or extensions\u003c\/li\u003e\n\u003cli\u003eQuick and simple installation\u003c\/li\u003e\n\u003cli\u003eOptional professional grade 260gsm geotextile underlay (required to maintain guarantee)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e25-year guarantee\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOrder your custom box welded butyl pond liner today\u003c\/strong\u003e and join the thousands of water gardeners who've made butyl their liner of choice — for good reason.\u003c\/p\u003e\n\u003ch3\u003eCan Be Repaired?\u003c\/h3\u003e\n\u003cp\u003eNeed to extend or repair? Butyl rubber can seamed by using MyPond Ms300 or be vulcanised, making future modifications straightforward and preserving the integrity of the liner throughout its lifetime.\u003c\/p\u003e\n\u003ch2\u003e25-Year Guarantee — Buy Once, Build for Life\u003c\/h2\u003e\n\u003cp\u003eWe stand behind the quality of our butyl pond liners with a comprehensive \u003cstrong\u003e25-year guarantee\u003c\/strong\u003e. When you invest in a box welded butyl liner, you're investing in a pond that will serve you for generations.\u003c\/p\u003e\n\u003ch2\u003eQuick Installation, Long-Term Performance\u003c\/h2\u003e\n\u003cp\u003eDesigned to be installed into concrete block or timber pond structures, our box welded liners make installation quick and straightforward — simply lower into position and secure. No specialist skills required, no site joining, and no stress.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended Use:\u003c\/strong\u003e Concrete block, timber frame, or raised pond structures. Not intended as a standalone tank.\u003c\/p\u003e\n\u003cp\u003eFor best results, protect your liner with a quality geotextile underlay on all surfaces.\u003c\/p\u003e\n\u003ch2\u003eKey Features at a Glance\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1mm premium butyl rubber construction\u003c\/li\u003e\n\u003cli\u003eMade-to-measure to your exact pond dimensions\u003c\/li\u003e\n\u003cli\u003eFully welded corners and flanges — zero site joins\u003c\/li\u003e\n\u003cli\u003ePerfect fold-free fit into your pond\u003c\/li\u003e\n\u003cli\u003eUV stable, temperature resistant, and age-resistant\u003c\/li\u003e\n\u003cli\u003eNo plasticisers — safe for fish and plants\u003c\/li\u003e\n\u003cli\u003eSuperior tear and tensile strength\u003c\/li\u003e\n\u003cli\u003eCan be vulcanised for future repairs or extensions\u003c\/li\u003e\n\u003cli\u003eQuick and simple installation\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e25-year guarantee\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOrder your custom box welded butyl pond liner today\u003c\/strong\u003e and join the thousands of water gardeners who've made butyl their liner of choice — for good reason.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is a box welded pond liner?\u003c\/strong\u003e\u003cbr\u003eA box welded pond liner is a custom-made liner factory-cut and welded at the corners to perfectly match your pond's exact dimensions. Unlike flat sheet liners that require folding on-site, a box welded liner drops in cleanly with no pleats or folds — giving a neat, professional finish and reducing stress on the material.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is 1mm butyl rubber the best material for pond liners?\u003c\/strong\u003e\u003cbr\u003e1mm butyl rubber is the premium choice for pond lining. It offers exceptional elasticity, UV resistance, and temperature tolerance that EPDM and PVC alternatives can't match. Butyl contains no plasticisers or additives — no risk of chemicals leaching into your water — making it completely safe for fish and plants. The material of choice for water gardening professionals for over 40 years.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long will a butyl box welded pond liner last?\u003c\/strong\u003e\u003cbr\u003eOur liners come with a 25-year guarantee. Butyl rubber does not shrink, become brittle, or degrade with UV exposure or age. With proper installation and care, many butyl liners remain fully functional well beyond the guarantee period.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size do I need?\u003c\/strong\u003e\u003cbr\u003eEvery liner is made to order. You'll need the internal length, width, and depth of your pond structure. Get in touch if you need help calculating your dimensions before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I specify the flange (top lip) size?\u003c\/strong\u003e\u003cbr\u003eYes. A top flange is included as standard and can be made to any size you specify. If no flange is required, enter 0mm when ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it suitable for a koi pond?\u003c\/strong\u003e\u003cbr\u003eAbsolutely. The precision fit eliminates folds where debris can accumulate, the butyl is completely fish safe, and the durability keeps your pond environment stable for years. Must be installed into a concrete block or timber frame structure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used as a standalone tank?\u003c\/strong\u003e\u003cbr\u003eNo. Box welded pond liners are designed to be installed into a rigid structure such as concrete block or timber-built ponds. They are not self-supporting standalone tanks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need an underlay?\u003c\/strong\u003e\u003cbr\u003eYes. We recommend a quality geotextile underlay on all contact surfaces to protect against puncture from stones or roots and to extend the life of the liner.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the liner be repaired if damaged?\u003c\/strong\u003e\u003cbr\u003eYes. Butyl rubber can repaired using MyPond Ms300 or be vulcanised, meaning it bonds and repairs effectively. Butyl-to-butyl bonds are extremely strong and watertight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is it delivered and installed?\u003c\/strong\u003e\u003cbr\u003eMade to order and delivered folded for easy handling. Simply lower into your prepared pond structure, unfold into position, and secure the flange. No specialist tools or skills required.\u003c\/p\u003e","brand":"CWD Pond","offers":[{"title":"Default Title","offer_id":56342846996859,"sku":"Default Title","price":1.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0490\/0401\/9864\/files\/IMG-20220517-WA0009.jpg?v=1758710694","url":"https:\/\/cwdsandbach.co.uk\/products\/box-welded-pond-liner","provider":"CWD Pond","version":"1.0","type":"link"}