Geosynthetic Clay Liners

Geosynthetic Clay Liners

Geosynthetic Clay Liners (GCL) are high-performance geocomposites that are used as an alternative to conventional compacted clay liners. GCLs consist of two layers of geotextile stitched together enclosing a layer of processed sodium bentonite. Bentonite is a natural sealant, and when in contact with water, swells to form a low permeability clay liner. Geosynthetic clay liners have a long-lasting resistance to physical and chemical break-down in harsh environments such as landfills and other containment systems.

Available in panels and rolls up to 2,250 square feet.


  • Unique self-sealing attributes that reduce the risk of punctures and leakage.
  • Excellent shear resistance properties due to needlepoint reinforcement.
  • Reduced leakage by a factor of 30 over compacted clay.
  • Better hydraulic performance.
  • Ease of installation. & Increased air space.
  • Cost-effective: one truckload of GCL replaces 200 truckloads of clay.


  • Irrigation ponds, canals, reservoirs, & ditches
  • Landfills & dams
  • Agricultural
  • Municipal
  • Aquaculture & horticulture
  • Liners & covers
  • Landfill liners, covers, & caps
  • Liquid containment
  • Secondary containment
  • Wastewater lagoons
  • Mining-heap leach & slag tailings
  • Golf courses & decorative ponds
  • Solid waste containment
  • Water & wastewater treatment & containment
  • Industrial applications
  • Environmental containment

More Information

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