Geosythetic® Clay Liners (GCLs)
GCLs are high performance environmental liners comprised of a layer of low-permeability sodium bentonite combined with geosynthetic carriers such as woven and/or nonwoven geotextiles and in some cases polymer geomembranes. GCLs have been proven to provide better engineered performance and durability than several feet of compacted clay with a total composite thickness of less than one quarter of an inch.
Seaming a GCL consists of little more than an overlap, filled with a layer of loose, granular sodium bentonite
Cross section of a standard GCL.