Geosynthetic Clay Liner

Geosynthetic Clay Liner (GCL), also named "Bentonite Composite Waterproof Mat", is a high-performance geosynthetic material manufactured by needle-punching natural sodium bentonite granules between two geotextile layers.

Our geosynthetic clay liner delivers exceptional hydraulic sealing, self-healing capacity, and contaminant barrier performance, engineered for critical containment applications in environmental and geotechnical infrastructure.

Raw Materials: Natural Sodium-Bentonite Composite, PET (Geotextile), Woven Fabric

Packing Method: Bagged Rolls

product details

Production Line Process and Raw Materials

Our company adopts latest domestic production equipment, and the raw materials are natural sodium bentonite particles with high expansion.

In order to ensure 100% product pass rate, quality control department of the company to implement the production line inspection and random inspection of finished products, for the quality of product of the “Zhonglong” brand to provide double insurance.

Specifications of Geosynthetic Clay Liner

High-Quality Geosynthetic Materials

Geosynthetic Clay Liner is made of natural sodium-based bentonite granules, which consists sealing bentonite powder or particles sandwiched between two layers of geotextile using needle punching technology, known for their high expansion performance.

Physical Durablility

Geosynthetic Clay Liner exhibits enhanced puncture resistance, high tensile strength, ensuring durability and longevity.

Expansion Capacity

Geosynthetic Clay Liner works easily and rapidly. Upon contact with water, the bentonite hydrates and expands, forming impermeable gel, which has excellent expansion and high water absorption capabilities, preventing leakage and seepage.

Specifications of Geosynthetic Clay Liner

Mass per unit area	4000g/m²~6000g/m²
Width	3m~6m
Length	10m，20m，30m，40m，*Customerizable

Technical Parameter

Download File: Zhonglong GCL (Bentonite Waterproofing Blanket) TDS

JC/T 2054-2020

No.	Item	Unit	GCL-NP	GCL-OF	GCL-AH
1	Deviation Rate of Mass per Unit Area	g/m²	≥4000 and not less than specified value	≥4000 and not less than specified value	≥4000 and not less than specified value
2	Tensile Strength	N/100mm	≥600	≥700	≥600
3	Elongation at Maximum Load	%	≥10	≥10	≥8
4	Peel Strength (Non-woven Fabric to Woven Fabric)	N/100mm	40	40	-
5	Permeability Coefficient	m/s	≤5.0×10⁻¹¹	≤5.0×10⁻¹²	≤1.0×10⁻¹²
6	Hydrostatic Pressure Resistance	MPa	0.4MPa, no leakage for 1h	0.6MPa, no leakage for 1h	0.6MPa, no leakage for 1h
7	Bentonite Swelling Index	mL/2g	≥24	≥24	≥24
8	Methylene Blue Absorption	g/100g	≥30	≥30	≥30
9	Fluid Loss	mL	≤18	≤18	≤18
10	Bentonite Durability	mL/2g	≥20	≥20	≥20