SB L 5 combines the natural sodium bentonite of the SB series with a laminating polyethylene film, which makes the mat impermeable and extends its chemical resistance to the pH 1–13 range. Static puncture resistance is at least 2.2 kN, tensile load at least 12 kN/m along and 7 kN/m across the roll. The mat is suitable for liners of oil and gas facilities, landfills, tailings storage facilities and hydraulic structures, remains flexible down to −70 °C and has an unlimited service life.
| Manufacturer | BentIzol — OOO “BentIzol”, Vvedenskoye |
|---|---|
| Type | bentonite waterproofing |
| Use | hydraulic structures and dams, tanks and pools |
| Base | geosynthetic roll material: needle-punched carrier of woven (160 µm) and nonwoven (200 µm) polypropylene with bentonite granules (natural sodium bentonite); laminated with 180 µm polyethylene film; polymer additives are not permitted |
| Packaging | roll 5 × 40 m, weight 1,116 kg; on a core in a sealed polyethylene film sleeve |
| Application method | compact the base or embankment and clear it of debris, stones and vegetation; unroll the roll with the “black side” down; longitudinal overlap at least 15 cm, transverse at least 30 cm, stagger transverse joints by at least 30 cm; spread bentonite granules evenly in the overlap, about 0.5 kg per linear m; protective cover layer at least 30 cm; laminated layer facing the more aggressive side, overlaps “mat to mat”, “film to film”; on slopes steeper than 1/4–1/5 (depending on soil type) — a cellular geogrid with anchors through the mat, sprinkle puncture points with granules; on vertical surfaces — construction stapler, fastening gun |
| Application temperature | installation in any season at any temperature |
| Key properties | bentonite content 5.0 kg/m²; mass per unit area 5,490 g/m²; permeability coefficient no more than — (impermeable) m/s; flux no more than — (impermeable) m³/m²·s; static puncture resistance at least 2.2 kN; tensile load at least 12 (longitudinal) / 7 (transverse) kN/m; tear strength at least 400 N/m; peel strength of the laminating layer at least 360 N/m; dynamic perforation (cone drop) no more than Ø10 mm; thickness at 2 kPa 6.7 mm; flexibility down to −70 °C without damage; resistance to aggressive media pH 1–13; withstands hydrostatic pressure up to 7 atm; service from −70 to +60 °C; self-healing of punctures and cuts; unlimited service life |
| Layer thickness | thickness at a pressure of 2 kPa 6.7 mm |
| Shelf life | recommended storage period no more than two years from the date of manufacture; in covered warehouses or under sheds, protected from moisture, sun, mechanical and chemical damage; no more than 5 rolls high |
| Standards | STO 87299967.003-2022 “Geosynthetic bentonite roll materials of the BentIzol® type. Specifications”; GOST R certificate of conformity; environmental compliance certificate; seismic resistance certificate; QMS GOST ISO 9001:2015; ITB certificate (Instytut Techniki Budowlanej, Poland); opinion of NIIES (RusHydro); opinion of the K.D. Pamfilov AKKh (Academy of Municipal Economy) |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
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