BENTOMAT® Geosynthetic Clay Liners
The Global Standard for GCLs
Sodium bentonite-based GCLs provide an excellent hydraulic barrier in applications where leachate in direct contact with the GCL is relatively non-aggressive, or in composite lining applications where the GCL is overlain by a thermally welded geomembrane and hydrates from uptake of innocuous moisture from the subgrade.
Interface and internal shear strength
Depending on the site conditions, the interface and internal shear strength requirements may vary. BENTOMAT is available in a non-reinforced configuration to allow maximum value for your site. It is also available with the industry leading highest needle-punch density providing maximum performance when high internal shear strength is needed.
Common applications for BENTOMAT GCLs
Configurations
STANDARD REINFORCED GCLs
 | DN - Commonly used in canyon landfills where slopes are as steep as 1.5H:1V
- Suitable for applications requiring high internal and interface shear strengths
- Consists of a layer of sodium bentonite between two heavier weight nonwoven geotextiles
- Needlepunch reinforcement
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| DN9 - The next evolution in high shear strength performance
- Built on DN technology, DN9 offers the highest shear strength performance
- Superior peak shear strength properties for slope stability
- High density needlepunch reinforcement
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| ST - Ideal for applications involving slopes up to 3H:1V
- Most commonly specified GCL
- Consists of a layer of sodium bentonite between a woven and nonwoven geotextile
- Needlepunch reinforcement
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| STM - Commonly specified in mining applications
- Reduced bentonite loading is more cost-effective and easier to transport to remote mining sites
- Good alternative for projects where hydraulic requirements may not be as stringent
- Consists of a layer of sodium bentonite between a woven and nonwoven geotextile
- Needlepunch reinforcement
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NON-REINFORCED GCLs
| 200R - Acts as a low-permeability liner under a geomembrane in applications with slopes up to 10H:1V, or where high internal shear strength is not critical
- Excellent cost-effective alternative to compacted clay
- Consists of a layer of sodium bentonite between a woven geotextile and a lightweight nonwoven geotextile
- Needlepunch bonded
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COMPOSITE LAMINATE GCLs
 | CLT - Ideal for more demanding landfill covers and liquid containment applications involving steep slopes
- Consists of a layer of sodium bentonite between two geotextiles laminated to a textured HDPE geomembrane
- Needlepunch reinforcement
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| CL - Used in landfill covers, ponds, and liquid containment
- Ideal for applications involving slopes up to 3H:1V
- Excellent hydraulic performance and has puncture and tensile strengths beyond conventional plastic membranes
- Consists of two carrier geotextiles encapsulating a layer of sodium bentonite with a polyethylene geofilm laminated to one side
- Needlepunch reinforced
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| 600CL (non-reinforced) - Used for flat areas of landfill caps and high hydraulic head conditions in liquid containment applications
- Suitable for low shear strength applications
- Consists of two lightweight geotextiles encapsulating a layer of sodium bentonite with a polyethylene geofilm laminated to one of the geotextiles
- Needlepunch bonded
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