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Geosynthetic Clay Liner - Permanent Waterproof Material

Geosynthetic clay liner is also named sodium bentonite composite waterproof pad. This is to make high swelling sodium bentonite filling into the inside between special composite geotextile and non-woven fabric. The bentonite impermeable cushion that made of acupuncture method can form a lot of small fiber spaces. This is to make the bentonite particles can not flow in one direction. When encountering water, it can form uniformly high density colloidal waterproof layer in the pad, and effectively prevent water leakage. Geosynthetic clay liner is suitable for artificial lake water, landfill, underground garage, roof garden, pool, oil depot and chemicals yard.

Two pieces of geosynthetic clay liner samples are lying on the ground, and one is frontage side, the other is reverse side.
GCL-1: Geosynthetic clay liner.
Sodium bentonite fills into the inside between special composite geotextile and non-woven fabric.
GCL-2: The inner of geosynthetic clay liner is sodium bentonite.


  • Product name: geosynthetic clay liner.
  • Material: sodium bentonite, special composite geotextile and non-woven fabric.
  • Width: 6 m.
  • Length: 30 m.
  • Weight (gram/square meter): 4 kg/m2 - 6 kg/m2.
  • Note: We also accept special specifications.


  • Lightweight.
  • Small volume.
  • Excellent flexibility.
  • Simple construction.
  • Permanent waterproof.
  • Good sealing performance.
  • Green environmental protection.
There is a roll of geosynthetic clay liner that is on the produce machine, we can see it from different views.
GCL-3: Geosynthetic clay liner roll produce process.

Geosynthetic clay liner is a kind of anti leakage earthwork synthetic material that applicable for artificial lake water, garbage landfill, underground garage, roof garden, pool, oil depot and chemicals yard and other places.

Black geosynthetic clay liner is covered around the small pond, and there is little water in the small pond.
GCL-4: Geosynthetic clay liner can be used for pond.
The machine is laying the white geosynthetic clay liner on the ground, and several workers are looking beside it.
GCL-5: Geosynthetic clay liner is suitable for drilling lining.
White geosynthetic clay liner and black geomembrane are laid on a large area, and there are some cars beside it.
GCL-6: Geosynthetic clay liner is applicable for landfill.
There is a piece of white  geosynthetic clay liner covered on the ground, and some workers are walking on it.
GCL-7: Geosynthetic clay liner is mainly used for waterproofing construction.
Rolls of white geosynthetic clay liner are laid on the slope, black geomembrane is covered on it, and there are some workers working.
GCL-8: Geosynthetic clay liner can also be used for artificial lake.

Waterproof principle:
The mineralogical name of bentonite is montmorillonite. Natural bentonite by chemical composition is mainly divided into two types: sodium group and calcium base. Bentonite has the characteristic of water swelling. Generally, when calcium bentonite expands, its expansion is only about 3 times of its own volume. But sodium based bentonite can adsorb five times water of its own weight when encountering water, and volume expansion to more than 15-17 times. The sodium bentonite locked up in the middle of the two layer of the synthetic material can play a role in the protection and reinforcement. And make the geosynthetic clay liner has a certain integral shear strength.

Construction method and attentions:

  1. When laying sodium bentonite composite waterproof pad, usually put the non-woven (white) upward, woven cloth (black) towards down laying, or according to the design requirements, engineering requirements to lay.
  2. When laying, it should avoid the raining day, if suddenly meet the rainy day, it should stop laying and covered with plastic film to prevent rain water intrusion and occur hydration.
  3. Sodium bentonite composite waterproof pad construction should confirm water flow direction first, laying along the water flow direction, make the upstream waterproof gasket pressed on the downstream waterproof pad.
  4. In the inclined surface and the slope construction, sodium bentonite composite waterproof pad length direction should perpendicular to bottom lying.
  5. Bottom laying should be parallel lapping, considering the foundation of sinking deformation laying, can wrinkle at the bottom, appropriate relax and close to the ground tightly.
  6. When laying, it can use mechanical or artificial way. Mechanical laying can take thick wall iron pipe or the iron stick to enter into roll core. One side pull open, after fixed, suspend in midair, open and flat.
  7. When in construction, if sodium bentonite composite waterproof pad needs cutting, only need a knife can cut freely according to the needs.
  8. When laying, strictly prohibited to put fire or cigarettes on any side of the sodium bentonite composite waterproof pad.
  9. When in laying, if the sodium bentonite composite waterproof pad is broken, it should use waterproof pad that is 300 mm larger than damaged place around to cover and then fixed.

Geosynthetic clay liner rolls can be wrapped with black or white woven bags, and then on pallets or at your requirements.

Some geosynthetic clay liner rolls are packaged with black woven bags lying on the ground.
GCL-9: Geosynthetic clay liner rolls can be packaged with black woven bags.
Geosynthetic clay liner rolls packaged with white woven package are piled up orderly on wooden pallets in the factory.
GCL-10: The package of geosynthetic clay liner rolls can also be white woven bags.

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