They are rolls of factory fabricated thin layers of bentonite clay sandwiched between two geotextiles or bonded to a geomembrane. Structural integrity of the subsequent composite is obtained by needle-punching, stitching or physical bonding. GCLs are used as a composite component beneath a geomembrane or by themselves in geoenvironmental and containment applications.

Below is a list of the geosynthetic clay liners (GCLs) HGI carries:

Bentomat ST         15ft x 150 ft   (4.6m x 45.7m)

Bentomat SDN       14.5ft x 150ft (4.4m x 45.7m)

Bentomat DN         14.5ft x 150ft (4.4m x 45.7m)
      
Bentomat STM        15ft x 200ft   (4.6m x 60.9m)

Bentomat CL          15ft x 150ft   (4.6m x 45.7m)
     
Bentomat CLT         15ft x 150ft   (4.6m x 45.7m)

Bentomat 600 CL     15ft x 150ft   (4.6m x 45.7m)

Bentomat 200R       15ft x 150ft   (4.6m x 45.7m)

Claymax 200R         15ft x 150ft   (4.6m x 45.7m)