HDPE Vs EPDM: More puncture resistant, Less likely to rip or tear, Lighter weight, Less flexible but still easy to handle * HDPE Vs PVC: Much more UV resistant, More puncture resistant, Less likely to rip or tear, Longer warranty-10 year Vs 5 year, Less flexible, but still easy to handle * Available in many popular sizes as well as special order sizes to 250" x 300" in one solid piece! * Industrial Strength Liner For Koi Ponds & Water Features * HDPE (high-density polyethylene) Pond Liner is a plastic liner that is less flexible and moldable when compared to EPDM (ethylene propylene diene monomer rubber) Rubber Pond Liner. HDPE Plastic Liners are best used for gentle sloping ponds, ponds with few contours, and minimal shelving. HDPE does not fold as well or conform to heavily contoured ponds like EPDM Rubber Pond Liners do. HDPE is an excellent choice for the right situation.