MASTERBENT® bentonite mat — waterproofing of foundations and underground structures
Bentonite mat for waterproofing foundations, basements, car parks, tunnels and trafficable roofs; compact 1.15 × 5 m rolls of 31 kg.

In this version, the HDPE-GT or LLDPE-GT polyethylene geomembrane is bonded with an adhesive to geotextile on one or both sides, with the longitudinal edges left unbonded so that the sheets can be welded. The composite corresponds to geomembranes of types 5/1 and 5/2, retains chemical resistance at pH 0.5–14, is resistant to ultraviolet radiation and works from −60 to +60 °C. Service life is at least 50 years; applications are MSW landfills, tailings storage facilities, oil and gas facilities, canals, reservoirs and dams.
| Manufacturer | BentIzol — OOO “BentIzol”, Vvedenskoye |
|---|---|
| Type | roll materials and membranes |
| Use | hydraulic structures and dams, tanks and pools |
| Base | geomembrane HDPE-GT or LLDPE-GT bonded with an adhesive to geotextile on one or both sides (the longitudinal edges are left unbonded for welding) |
| Packaging | rolls 50 or 100 m long, 5–6 m wide |
| Key properties | membrane thickness from 1.0 to 3.0 mm; geotextile density from 100 to 1,000 g/m²; chemical resistance pH 0.5–14 (acids, alkalis, petroleum products, oils); UV resistance; from −60 to +60 °C, repeated freezing and thawing; service life at least 50 years |
| Layer thickness | 1.0–3.0 mm |
| Standards | STO 87299967.005-2021; complies with GOST R 56586-2015; certificates of conformity under GOST R and under the STO |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Bentonite mat for waterproofing foundations, basements, car parks, tunnels and trafficable roofs; compact 1.15 × 5 m rolls of 31 kg.
Bentonite mat with a polymer additive and a laminating film for foundations, tunnels and wells; withstands water pressure up to 7 atm.
Drainage geocomposite of polyethylene geonet with geotextile on one side for drainage of foundations, tunnels and roads.
Lightweight bentonite mat of the SAB series for anti-seepage liners of ponds, canals and landfills; a 5 × 40 m roll weighing 880 kg.
Bentonite mat with a polymer additive to the bentonite for foundations, basements and tunnels; permeability coefficient no more than 0.7×10⁻¹¹ m/s.
Bentonite mat with a laminating polyethylene film for liners in aggressive media with pH from 1 to 13; water pressure up to 7 atm.