AquaToughrubber pond liner is a nominal 45-mil-thick, non-reinforced Ethylene Propylene Diene Terpolymer (EPDM) based elastomeric waterproof liner for use in water garden and pond applications. The membrane is specically formulated for long-term use in buried or exposed geomembrane applications. AquaTough has been formulated to be compatible with aquatic life. It is recommended that customers test AquaTough before use to ensure it is compatible with the specic aquatic species for the proposed application. sh friendly AquaTough rubber pond liners combine design flexibility, long-term durability and easy installation, making them an ideal choice for a variety of waterscape applications.