... established sealing product 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 established ... equivalent hydraulic protection of several feet of compacted clay. This swelling allows the bentonite to seal around ...