Firestone, the preferred liner for decorative water features The Firestone EPDM liner is particularly suitable for use in the construction of water gardens and Koi ponds.
Liner Underlay is recommended for all pond liners, especially Firestone PondGard EPDM liners.
Makes all pond liners more puncture resistant
Protects pond liners from sharp objects in the soil
Stabilizes ground under the liner to keep EPDM and other pond liners from "over-stretching"