Terre Armée and subsidiary companies offer waterproofing solutions using TerraLine™ GCL geosynthetic clay liners.

TerraLine™ GCL geosynthetic clay liners are factory made hydraulic barriers consisting of very low-permeability bentonite powder supported by geotextiles, non-woven on the covering side and woven on the carrying side.

The two layers of geotextiles are joined by a reinforcing system of fibers going through the bentonite layer.

The engineering function of a TerraLine™ GCL is containment as a hydraulic barrier to water, leachate or other liquids and sometimes gases.

Depending on the application and on the geotechnical site conditions, TerraLine™ GCL may be associated to other geosynthetics such as geogrids, woven geotextiles or geocomposite drains to provide robust and durable waterproofing solutions.

TerraLine™ GCL can be used for a variety of applications:

  • Landfill lining or capping: containment of leachate in construction of landfills (urban, industrial and special solid waste) and reclamation of exhausted landfill sites or contaminated industrial areas.
  • Mining: lining of tailings ponds for heap-leaching mining process.
  • Waterproofing: used in reservoirs, hydraulic works, decorative ponds, recreational lakes, open-cut tunnels, underpasses and secondary containment of petroleum storage tanks & building basements.
  • Ground water protection: water table protection in transport infrastructures (roads, railways, airports).
  • Soil retaining structures: protection of benches in multi – tier retaining and MSE structures.

For the delivery of these products in your territory, you can contact our nearest representative.




The size of the bentonite particles and of the openings of the non-woven geotextile are calibrated to ensure the optimal waterproofing functioning of TerraLine™ GCL solutions 



Used alone or with other geosynthetics, TerraLine™ GCL geosynthetic liners are efficient hydraulic barriers for a wide array of applications.



Due to intrinsic characteristics such as self-healing properties and a strict quality management, TerraLine™ GCL solutions are adapted to sensitive applications such as landfills or tailing ponds.

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