SikaProof Bentonite is a needle-punched thermally locked Geosynthetic Clay liner used to waterproof below ground concrete structures. It is ideally suited to conventional construction waterproofing applications, applications where concrete is poured or sprayed directly against the waterproofing system, where other traditional types of barriers are susceptible to mechanical damage, cast in-situ floors and walls, precast panel walls, foundation pile sealing and shotcrete walls.