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GCL Liners

Geosynthetic clay liners (GCL) are manufactured hydraulic barriers consisting of a layer of bentonite or other very low-permeability material supported by geotextiles and/or geomembranes, most products are mechanically held together by needle-punching, with a few products stitched together and a few using chemical adhesives.

Geosynthetic clay liners (GCL) offer advantages for containment applications and Compacted Clay Liners (CCL). GCL liners have numerous advantages compared to Compacted Clay liners (CCL) in terms of low hydraulic conductivity. GCL liners are less expensive, and require less skilled labor for installation than CCL liners. GCL liners also occupy less depth in the soil base compared to CCL (i.e. less shipping costs and less excavation of the native soil). During freeze/thaw cycles, GCL liners have good resistance hence it can be easily rectified.

Geosynthetic clay liners (GCLs) are an established sealing product in the geoenvironmental industry. They are used in landfill caps and base liner applications under roads, railways, secondary containment for above ground tank farms, as well as within various other containment structures such as dams, canals, ponds, rivers and lakes. They are also used for waterproofing of buildings and other similar structures.

Production Options for GCL Liners


BENTOLINER® combines the dimensional stability and increased internal shear strength of reinforced geotextiles with the high swelling capacity and low permeability of sodium bentonite. BENTOLINER geosynthetic clay liners have a high sealing effect and outstanding mechanical properties that can be used on steeper slopes and in high-load applications where increased internal shear strength is required. BENTOLINER® EC creates an impermeable barrier. Its dimensional stability and increased internal shear strength offers a high sealing effect and outstanding mechanical properties for different applications. Key points:
  • Engineered for flat slope surfaces and low load applications.
  • Combines dimensional stability and slightly reinforced geotextiles with the high swelling capacity and low permeability of sodium bentonite.
  • Provides high sealing effect.
  • Provides better hydraulic properties compared to compacted clay.
  • More cost effective than compacted clay.
BENTOLINER® NS is a needlepunched reinforced composite geosynthetic clay liner (GCL) comprised of a uniform layer of granular sodium bentonite encapsulated between a woven and a nonwoven geotextile.  The product is intended for moderate to steep slopes and moderate to high load applications where increased internal shear strength is required. Key points:
  • Engineered for moderate to steep slopes and moderate to high load applications
  • Combines the dimensional stability and increased internal shear strength of reinforced geotextiles with the high swelling capacity and low permeability of sodium bentonite.
  • Provides high sealing effect and outstanding mechanical properties.
  • Provides better hydraulic properties compared to compacted clay.
  • More cost effective than compacted clay.

BENTOLINER® NSC is a needlepunched reinforced composite geosynthetic clay liner (GCL) comprised of a uniform layer of granular sodium bentonite encapsulated between a woven and a nonwoven geotextile with a uniform polypropylene geofilm coating applied to the woven surface to lower the hydraulic conductivity. The product is intended for applications that require excellent hydraulic conductivity properties and/or bentonite protection for moderate to steep slopes and moderate to high load applications where increased internal shear strength is required. Key points:
  • Coated with polypropylene geofilm to reduce hydraulic conductivity and protect bentonite from aggressive leachates.
  • Engineered for applications that require excellent hydraulic conductivity and protection for moderate to steep slopes and moderate to high load applications where increased internal shear strength is required.
  • Combines the dimensional stability and increased internal shear strength of reinforced geotextiles with the high swelling capacity and low permeability of sodium bentonite.
  • Provides high sealing effect and outstanding mechanical properties.
  • Provides better hydraulic properties compared to compacted clay.
  • More cost effective than compacted clay.
BENTOLINER® NW is a needlepunched reinforced composite geosynthetic clay liner (GCL) comprised of a uniform layer of granular sodium bentonite encapsulated between a nonwoven and a scrim-nonwoven geotextile for dimensional stability.  The product is intended for moderate to steep slopes and moderate to high load applications where increased internal shear strength is required. Key points:
  • Engineered for moderate to steep slopes and moderate to high load applications.
  • Double nonwoven GCL provides increased shear performance.
  • Combines the dimensional stability and increased internal shear strength of reinforced geotextiles with the high swelling capacity and low permeability of sodium bentonite.
  • Provides high sealing effect and outstanding mechanical properties.
  • Provides better hydraulic properties compared to compacted clay.
  • More cost effective than compacted clay.

BENTOLINER® CM is the first composite liner system designed specifically for oil and gas secondary containment solutions. A uniform layer of sodium bentonite is distributed between a woven and a nonwoven geotextile. The bright orange color makes it easily distinguishable from cover soils. Key points:
  • Simple, cost-effective installation techniques
  • Installation in weather conditions from cold and windy to hot and humid without damage
  • Overlapping installation seam methods allow installation without welding
  • The unique orange color provides easy identification during installation as well as excavation

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