Our pond liner is made of LDPE material, compaired with HDPE, LDPE is more soft and more flexible, it reduce the aging problems caused by creases, pro-environmentally, sunlight-proof, weather-proof. 17Mil thickness is enough for most using condition. Providing the penetration of harmful substances into the pond and give your fish and plants a secure living environment. Specification: Material: LDPE Color: Black Size: 20 ft x 20 ft Thickness: 17 Mil Lifespan: 10-50 years 20*20 FT Ponder Liner Great liner for any backyard waterfalls, outdoors ponds, fish/koi ponds, and other water features; Can be used in different ways: Utilize the liner for raised garden beds, sub-irrigation planters, and other self-watering projects Made by LDPE material, it could antiseep, and it will saving water, prevent any harmful substances into the pond, or prrevent any harmful substances Pollution of underground water sources. Made by LDPE material, It's much more malleable, can prevent most sharp objects pierce the ponder liner, cause leaking water. Good flexibility, Easier to adapt to changes in ambient temperature. Easy operation, this LDPE material could be welded by welding machine, more convenience for big project. Suitable for back yard pond, suitable for water gardens, fishponds, backyard waterfalls, golf courses, artificial lakes, riverways, lotus ponds, fountains. Suitable for agricultural project, and for sloping sides, rooftops, etc. 20x20 Ft Pond Liner 13x10 Ft Pond Liner Add to Cart Add to Cart Customer Reviews 4.2 out of 5 stars 70 4.2 out of 5 stars 39 Price $92.99$92.99 $39.99$39.99 Size: 20x20 Ft 13x10 Ft Thickness: 17Mil 20Mil Material: LDPE LDPE Color: Black Black Lifespan: 10-50 years 10-50 years