BentIzol® 3-DM drainage mat — drainage with a laminated geomembrane
Drainage mat with double-sided geotextile and a laminated geomembrane that drains water and creates an additional anti-seepage layer.

BentIzol granules and powder are an auxiliary material for bentonite mats: they are sprinkled into overlaps, technological openings and horizontal–vertical transitions, and mixed with water in a 1 : 3.5 ratio they make a paste for vertical overlaps, cracks and utility penetrations. BentoStandard is made from soda-activated clay of the Zyryanskoye deposit, BentoPremium from alkaline clay, and BentoProfis with special additives is chosen for aggressive media. Supplied in 50 kg bags or 900 kg MKR soft containers.
| Manufacturer | BentIzol — OOO “BentIzol”, Vvedenskoye |
|---|---|
| Type | bentonite waterproofing |
| Use | foundations and basements, joints and junctions |
| Base | granulated bentonite and bentonite powder; BentoStandard — alkaline-earth clay from the Zyryanskoye deposit activated with soda ash; BentoProfis — with special additives for aggressive media |
| Packaging | bags of 50 kg or MKR soft containers of 900 kg |
| Application method | sprinkling of bentonite mat overlaps, technological openings and horizontal–vertical transitions; paste for vertical overlaps, cracks and utility penetrations — granules with water 1 : 3.5 |
| Key properties | free swell index at least 24 / 30 / 30 ml/2 g (Standard / Profis / Premium); fluid loss no more than 18 / 14 / 16 ml; cation exchange capacity at least 70 / — / 80 meq/100 g; moisture content no more than 12 %; granules 0.5–2.0 mm, powder 0–0.4 mm; bulk density no more than 1.2 g/cm³ |
| Consumption | about 0.5 kg per linear m of bentonite mat overlap |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
Drainage mat with double-sided geotextile and a laminated geomembrane that drains water and creates an additional anti-seepage layer.
Bentonite mats reinforced with a geotextile layer by cold lamination for steep slopes, weak and collapsible soils and seismic areas.
A bentonite mat with a factory-bonded weldable geomembrane forms a double anti-seepage liner for sites in difficult hydrogeological conditions.
Bentonite mat with a laminating polyethylene film for liners in aggressive media with pH from 1 to 13; water pressure up to 7 atm.
Swelling cord of bentonite with butyl rubber for cold construction joints, precast concrete joints and utility penetrations; up to 7.0 bar.
Polyethylene geomembrane textured on one or both sides for anti-seepage liners of landfills, tailings storage facilities and dams.