The Custom Pro 45 mil EPDM Pond Liner and Underlayment Combo Kit is simply the best sold anywhere! When compared to inexpensive polyvinyl chloride (PVC) and other economy pond liner, this kit's 45 mil thick EPDM premium pond liner is in its own class. The pond liner even has a lifetime manufacturer's warranty!
The heavy duty underlayment is designed to protect the pond liner from sharp rocks as well as roots and burrowing animals. Acting as padding, it increases the pond liner's puncture resistance by more than 400 percent! Place the underlayment between the soil and the pond liner.
Both the liner and underlayment are black. The pond liner appears silvery because it has a coating of white talc powder to keep it from sticking to itself when folded or rolled.