Key features

• Pre-applied: fixed before placing reinforcement and casting concrete
• Strong adhesive bond with fresh concrete
• High flexibility and crack-bridging
• No lateral water migration between concrete and membrane
• Made from non-recycled / virgin HDPE
• Temporarily resistant to weathering and UV exposure during construction
• Resistant to aggressive ground water and soil
• Reinforcement can be laid directly on membrane (no screed protection)
• Eco-friendly material

Applications

• Basements
• Subways
• Tunnels and other below-ground concrete structures
• Reinforced concrete base slabs and footings/grade slab
• Reinforced concrete walls (single-faced formwork)
• Extension and reconstruction works
• Prefabricated structures
• Reinforced concrete walls with single and double-faced formwork

Specifications

Chemical base: HDPE sheet membrane with adhesive layer and sand topping | Roll length: 20 m | Roll width: 1.2 m standard; 1.5 m and 2.0 m non-standard | Colour: HDPE side white; adhesive side white/off-white | HDPE film thickness: ≥ 0.75 mm (ASTM D3767) | Composite membrane thickness: ≥ 1.2 mm | Mass per unit area: 1.56 ± 5% kg/sqm | Static puncture resistance: ≥ 800 N (ASTM E154) | Tensile strength: ≥ 25 MPa free film (ASTM D412) | Elongation: ≥ 500 % free film (ASTM D412) | Dimensional stability: < 1 at 6 hrs/70 °C (ASTM D1204) | Peel adhesion to concrete (7 days): ≥ 1000 N/m (ASTM D903) | Seam strength: ≥ 880 N/m (ASTM D1876) | Low temperature foldability: Unaffected at -25 °C (ASTM D1970) | UV exposure resistance: Up to 45 days (ASTM G154) | Water vapour permeability: < 0.10 ng/Pa·s·m2 (ASTM E96 method B) | Water tightness: ≥ 70 m hydrostatic head (ASTM D5385 mod) | Water absorption: < 0.5 % (ASTM D570) | Shelf life: 12 months | Storage temperature: +5 °C to +30 °C | Application air/substrate temperature: +5 °C to +40 °C | Concrete to be placed within: 45 days of installation

Standards: IS 16471 : 2017 (bonded sheet membrane)