Tetra PVC Pond LinerTetra Pond PVC Pond Liner is made of high quality PVC that is resistant to damage from UV rays, punctures and tears. While extremely hardy and durable, the liner is still flexible and can be cut to fit any shape or pond design! Fish safe, high density PVC material UV, puncture and tear resistant Can be cut to fit any pond design 15 year warranty Pond liner is 20 mm thick for extended durability. Any rips or punctures that do occur can be repaired