Swelling waterproof blanket is a dedicated to the man-made lakes and water features, landfills, underground garage, roof garden, pool, oil depots and yard chemicals prevent leakage of geosynthetics, it is a high expansion sodium bentonite filled in a special composite geotextiles and nonwoven needle into the legal impermeable bentonite mat formation of many small fibers is the bentonite particles not like flow in one direction, the water in the pad within the formation of a uniform high-density gel waterproof layer to prevent water leakage. GCL is different from the unique role of the geomembrane: 1. The geomembrane for main landfill liner. 2 for landfill times geomembrane liner. 3 landfill geomembrane and clay layer, which is the lining of three components. 4 geomembrane landfill cover layer. With vertical cut-off wall of water adjacent to the geomembrane. Used to prevent coarse aggregate on the geomembrane geomembrane punctured. 7 used as the second layer of the lining of the underground storage wells.