Towallmark 20 x15 ft * 20 Mil Pond Liner, Pliable & Durable EPDM Material, Easy Cutting & UV Resistant, for Fish, Features, Waterfall Base, Fountains Towallmark 20 x 25 ft pond liner is made of LLDPE material, which is secured to your fish and plants. 20 Mil thickness is strong enough to withstand all kinds of weather conditions. In addition, the excellent waterproof and flexible performance can fit all types of surfaces and remain water. Suitable for fish pond, waterfall, artificial lake, aquaculture farm, sewage tank, rooftop, etc. Long Lifespan This large pond liner is designed for aging-proof can last for years. It can live up to 10 years of exposure to direct intense sun and more than 50 years without exposure Easy to Cut The pond liner is flexible, easily bending and floding to fit almost any shape of ponds. You can cut it into the shape you need for your particular pond. Premium 20 Mil LLDPE Liners The pond liner is made of pro-environmentally LLDPE material, secure and durable, can well protect the fish and plants in your pond. Size of 20 ft x 25 ft can be fit for various fish ponds. Specification Material LLDPE Color Black Size 20 ft x 25 ft Thickness 20 Mil Lifespan 10-50 years Lay out shape and dig the pond Lay down the pond liner and finish with edging Add water and equipment Widely Used Towallmark 20 Mil LLDPE Liners are perfect for: Decorative pondsKoi pondsFountainsNatural ecosystem pondsPondless water featuresStreamsAquatic water gardensWaterfalls and more. 20 mil LDPE Pond Liner Provides a safe & environmentally balanced habitat for your plants, and wildlife.