4000G/M2-6000G/M2 Bentonite Blanket Geosynthetic Clay Liner with ISO Certificate

Color: Black
Application: Electrical Engineering, Roads & Railways & Airports Project, Water Conservancy Project
Function: Reinforcement, Drainage
Classification: Composite Geotextiles
Material: Polyester
Type: Composite Geotextile

Product Description

Geosynthetic clay liner

Geosynthetic Clay Liners (GCLs) are geotextile and bentonite composites (typically sodium bentonite sandwiched between two layers of geotextile) engineered for a variety of environmental containment applications. The geotextiles offer a long lasting resistance to physical or chemical break-down in harsh elements, while the bentonite’s high swelling capacity and low permeability provide an effective hydraulic seal.

GCLs provide an excellent alternative to conventional Compacted Clay Liners by replacing a thick section of compacted clay with a thin layer of pure sodium bentonite. Benefits include easy installation, better hydraulic performance and resistance to varying weather conditions. Installation for most GCL projects can be completed by construction personnel using conventional equipment. GCLs also have unique self-sealing attributes, reducing the risk of failure due to adverse field and operating conditions.


  • Canals, stormwater impoundments and wetlands
  • Secondary containment
  • Highway and civil
  • Landfill liners
  • Landfill caps
  • Mining
  • Ponds

Technical data sheet

g/m2 ≥4000


ml/2g swell index ≥ 24

≥ 24

≥ 24
g/100g ≥ 30 ≥ 30 ≥ 30
N/100mm tensile strength ≥ 600 ≥ 700 ≥ 600
Elongation at max load ≥ 10 ≥ 10 ≥ 8
N/100mm peel strength Nonwoven geotextile and woven geotextile ≥ 40 ≥ 40 ≥ —
PE geomembrane and Non-woven geotextile ———- ≥30 —-
m/s permeability ≤5.0*10-11 ≤5.0*10-12 ≤ 1.0*10-12
Resistance hydraulic pressure


0.4Mpa,1h,no leakage

0.6Mpa,1h 0.6Mpa,1h,no leakage 0.6Mpa,1h0.6mpa,1h,noleakage
ml fulid loss ≤ 18 ≤ 18 ≤ 18
Durability of bemonite(Ml/2g) ≥ 20 ≥ 20 ≥ 20

NOTE;GCL-NP Needle punched process GCL

GCL-OF Neddle punched and coated process GCL

GCL-AH:Viswcose pmcess GCL


1. Improved leakage performance
2. Permanent waterproof performance
3. Simple construction and short time limit for a project.
4. Not influenced by air temperature.
5. A kind of green material and good to environmental protection.
6. More versatile than compacted clay
7. Increased airspace and liner efficiency

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