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Geo Synthetic Clay Liners
A Geosynthetic Clay Liner (GCL) is a factory-manufactured composite barrier consisting of two layers of geotextiles (woven or non-woven) stitched or bonded together, enclosing a core of natural sodium bentonite clay. It acts as a low-permeability liner, commonly used in environmental containment applications such as landfills, ponds, and canals.
Natural Sealing Barrier for Landfills & Ponds
Landfill base liners and capping systems
Artificial ponds and lakes
Canals, ditches, and stormwater basins
Mining tailing ponds and leach pads
Secondary containment for tanks and chemical storage
✅ Where Are GCLs Used?
✅ Key Features & Benefits
Very low hydraulic conductivity
Self-sealing and self-healing properties
Easy and fast installation compared to compacted clay
Lightweight and space-saving
Environmentally friendly natural material
Can be combined with geomembranes for double-liner systems
✅ How Do GCLs Work?
When hydrated, the sodium bentonite layer swells and forms a dense, self-sealing, low-permeability barrier that blocks the flow of liquids and gases. Combined with geotextiles, GCLs offer ease of installation and excellent sealing even in irregular or rough subgrade conditions.
Technical Specifications
Municipal solid waste landfills
Industrial waste containment
Decorative and irrigation ponds
Tunnel waterproofing
Aquaculture and agriculture ponds
✅ Applications
Types
Needle-Punched: High strength, good for slopes.
Stitch-Bonded: Basic type, for flat surfaces.
Adhesive-Bonded: For light-duty or indoor use.
Reinforced: Added strength for heavy loads.
Composite: GCL with geomembrane for high protection.