Geosynthetic clay liners Uanda gcl is a sandwitch composite composed of three layer material. The upper side is needlepunched nonwoven geotextile of 200gsm and bottom part is 120gsm black pp woven, the bentonite powder is reinforced by through stitching the fiber of nonwoven into the pp woven. This is environmental protection waterproof material, which compacted to ccl(compacted clay liner), gcl have the self-sealing property if it meet the seam under the size of 5mm, also reducing the risk of operation in many construction site. Ití»s easy to install and maintain and the permanent protection permeability is available. Pp woven bags with inner pe menbrane