Alfafol Pre-Packed PVC Pond Liner 0.5mm / 6m x 5mEasy to mould to the shape of your pond the Alfafol pond liner is pre cut for convenient pond construction. With a 0. 5mm thickness offering a quality layer of protective sealant to your pond. Pre cut to 6m x 5m which is big enough for medium sized ponds. The single ply PVC layer offers UV, weld seam, rot and cold resistance all year round. Features: 0. 5mm Thick. UV Resistant. Weld Seam Resistant. Rot Resistant. Cold Resistant.