{"product_id":"sinimaka-hdpe-pond-liner-16-x-20-ft-black-heavy-duty-uv-resistant-waterproof-barrier","title":"Sinimaka HDPE Pond Liner 16 x 20 ft Black — Heavy-Duty, UV-Resistant Waterproof Barrier","description":"\u003cp\u003e\u003cstrong\u003eSinimaka's 16 x 20 ft HDPE pond liner is a flexible, puncture-resistant waterproof membrane designed to create and protect outdoor ponds, fountains, waterfalls, and koi habitats.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis heavy-duty pond liner is made from high-density polyethylene (HDPE) without plasticizers, delivering a safe, long-lasting barrier that holds water and resists tears, UV, heat, cold and corrosion. It ships as a black, pliable sheet that can be trimmed onsite to match irregular pond shapes, and it’s also usable for planters, roof covers, temporary tarps and other garden projects. Read on for practical details that help you decide if this liner fits your next water feature.\u003c\/p\u003e\n\n\u003ch3\u003eHow well does this liner keep water in and protect fish?\u003c\/h3\u003e\n\n\u003cp\u003eThe HDPE construction provides a truly waterproof layer that prevents seepage and keeps pond water separate from surrounding soil. Its chemical composition avoids softening plasticizers, which helps maintain water quality for fish and aquatic plants.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eWaterproof and leak-resistant formulation\u003c\/li\u003e\n  \u003cli\u003eHigh puncture and tear resistance to avoid accidental breaches\u003c\/li\u003e\n  \u003cli\u003ePlasticizer-free material reduces risk of contaminant leaching\u003c\/li\u003e\n  \u003cli\u003eSuitable for fish, koi, plants and decorative water features\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs it easy to cut, shape, and install for irregular ponds?\u003c\/h3\u003e\n\n\u003cp\u003eThe black HDPE sheet is designed to be flexible and soft enough to bend around corners and curves while holding up to stretching and water pressure. You can trim it with utility knives or shears and form it to complex shapes without losing integrity.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eFlexible ductility for folding into corners\u003c\/li\u003e\n  \u003cli\u003eTrim-to-fit simplicity for custom pond layouts\u003c\/li\u003e\n  \u003cli\u003eSturdy under high-impact water forces to resist cracking\u003c\/li\u003e\n  \u003cli\u003eRecommended to lay protective underlayment like carpet or sand\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the liner resist weathering and long-term wear?\u003c\/h3\u003e\n\n\u003cp\u003eSinimaka HDPE is formulated for outdoor exposure, showing strong resistance to UV rays, temperature extremes, and corrosion so it remains serviceable through seasonal changes. With correct installation and a buffer layer between liner and raw soil or stones, the expected service life is extended.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUV-resistant surface to limit sun degradation\u003c\/li\u003e\n  \u003cli\u003eHeat and cold tolerance for year-round use\u003c\/li\u003e\n  \u003cli\u003eCorrosion resistance to maintain strength near minerals or salts\u003c\/li\u003e\n  \u003cli\u003eUse protective underlay to reduce abrasion and punctures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat other uses and practical tips should I know?\u003c\/h3\u003e\n\n\u003cp\u003eBeyond ponds, the 16 x 20 ft liner works well for backyard waterfalls, cisterns, garden fountains, planter boxes, emergency tarps and temporary roof covers. Practical measures during installation improve durability and performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCan double as liner for planters or rainwater collection\u003c\/li\u003e\n  \u003cli\u003eLay down old carpet, geotextile, or sand under the liner for protection\u003c\/li\u003e\n  \u003cli\u003eAvoid sharp rocks; smooth the excavation before placing the liner\u003c\/li\u003e\n  \u003cli\u003eTrim excess material and secure edges under edging or rocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: homeowners, landscapers and hobbyists building backyard ponds, koi keepers who need a reliable waterproof barrier, and gardeners looking for a multipurpose outdoor liner. If you want a robust, easy-to-shape membrane that resists weather and keeps water contained for fish and plants, this Sinimaka HDPE liner is a practical, cost-effective choice. Customer support is available if you encounter fit or installation questions.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the actual material of this 16 x 20 ft liner?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It’s made from high-density polyethylene (HDPE), a plasticizer-free waterproof membrane suitable for ponds and garden uses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need an underlay under the liner?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — using old carpet, sand, or geotextile under the liner reduces puncture risk and extends product life.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Sinimaka","offers":[{"title":"Default Title","offer_id":56834592932180,"sku":"B0CSDM7G6N","price":118.07,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/sinimaka-pond-liner-front-folded.jpg?v=1787051875","url":"https:\/\/gardenluxe.co.uk\/products\/sinimaka-hdpe-pond-liner-16-x-20-ft-black-heavy-duty-uv-resistant-waterproof-barrier","provider":"Gardenluxe Uk","version":"1.0","type":"link"}