Bentonit geosynthetische Tonauskleidungen (kurz für GCL) sind selbsthaftend und selbstdichtend to concrete or other construction structures thanks to its excellent swelling property. It is a good performance and cost-effective waterproofing barrier. It can be widely used in waterproofing or erosion control projects such as landfill, basement foundation, park foundation, decorative pond foundation and so forth.