Construction & Building•Insulation Materials
Bentonite Clay Liner
Bentonite clay liner is a geosynthetic waterproofing material used to provide impermeability in ground and structural applications. By combining natural sodium bentonite between geotextile layers through a specialized needle-punching technology, it forms a strong and effective barrier structure. Upon contact with water, it transforms into a gel form, creating a protective impermeable layer on the surface. Thanks to this property, it is preferred as a reliable waterproofing solution in waste containment sites, ponds, sub-foundation applications, tunnels, dam projects, and various infrastructure sectors. Contact us for this product or similar inquiries.
Quotes are provided for bulk purchases and export requests.
Technical Specifications
| Structure | Natural sodium bentonite + woven geotextile + nonwoven geotextile |
| Thickness | ≥5.50 mm |
| Elongation | %10.0–16.0 (MD), %6.0–10.0 (CD) |
| Flow index | ≤1×10⁻⁸ m³/(m²/s) |
| Fluid loss | ≥18 ml |
| Swell index | ≥24 ml/2 g |
| Product type | Geosynthetic clay liner (GCL) |
| Peel strength | ≥360 N/m |
| Product series | GCL4000, GCL4500, GCL5000, GCL5500, GCL6000, GCL6500, GCL7000 |
| Roll dimensions | 2.50 × 30 m or 5.00 × 40 m |
| Moisture content | ≥10% |
| Tensile strength | ≥11 / 11 kN/m |
| Bentonite raw material | Natural sodium bentonite |
| Permeability / K value | ≤5×10⁻¹¹ m/s |
| Static puncture resistance | ≥1.80 kN |
| Bentonite mass per unit area | 4700 g/m² ±5% |
| Composite mass per unit area | ≥5000 g/m² ±5% |
| Woven geotextile mass per unit area | 100 g/m² ±5% |
| Nonwoven geotextile mass per unit area | 200 g/m² ±5% |
