... in the geoenvironmental industry. Geosynthetic clay liners ,GCL seepage-proofing thickness:4-6mm material:bentonite+geotextile ... +geomembraneGeosynthetic clay liners ,GCL, impervious blanketGeosynthetic clay liners (GCLs) are an ... between two geotextiles. by different techniques, manufactured GCL, taishanshen, is mechanically bonded by needlepunching from one ...