Waterproofing
SelfSeal HDPE 150 HW
SelfSeal HDPE 150 HW
Sand Coated HDPE Membrane with Heat-Weldable Selvage
A heavy-duty HDPE waterproofing sheet membrane with heat-weldable selvage edges allowing secure and durable seam joints. The membrane offers high puncture resistance, excellent tensile strength and superior resistance to hydrostatic pressure, making it suitable for basements, tunnels, podium slabs and other underground structures.
Features and Benefits
- Pre-manufactured to a controlled thickness, reducing site-related thickness variation.
- High puncture resistance with high tensile strength and elongation.
- High peel adhesion to concrete and excellent adhesion at membrane joints.
- Heat-weldable selvage for reliable fusion of membrane overlaps.
- Pre-applied pressure-sensitive adhesive enables bonding to poured concrete.
- Helps prevent lateral water migration and provides resistance to high hydrostatic pressure.
- Suitable for demanding below-ground waterproofing applications.
- Retention of 90% tensile and elongation properties after 45 days UV exposure.
Area of Applications
- Basement and below-ground waterproofing.
- Waterproofing below raft foundations.
- Retaining walls and blind-side waterproofing.
- RCC podiums and car parks.
- Underground concrete structures.
- Cut-and-cover tunnels, subways, underpasses, roads and bridges.
- Underground metro structures.
- Structures exposed to hydrostatic pressure.
Technical Specifications
| Property | Test Method | Result |
|---|---|---|
| Composite Thickness | ASTM D3767:2003 | 1.5 mm |
| Pure HDPE Thickness | ASTM D3767:2003 | 1.2 mm |
| Tensile Strength – Longitudinal | ASTM D412:2016 | 25 N/mm² |
| Tensile Strength – Transverse | ASTM D412:2016 | 25 N/mm² |
| Elongation at Break – Longitudinal | ASTM D412:2016 | 500 % |
| Elongation at Break – Transverse | ASTM D412:2016 | 500 % |
| Puncture Resistance | ASTM E154:2008 | 1200 N |
| Low Temperature Flexibility at -25°C | ASTM D1970:2021 | No Crack |
| Resistance to Hydrostatic Head up to 7 bar (71.4 m) | ASTM D5385:2025 | No Leakage |
| Dimensional Stability – Longitudinal, 80°C / 24 h | ASTM D1204:2014 | < 1 % |
| Dimensional Stability – Transverse, 80°C / 24 h | ASTM D1204:2014 | < 1 % |
| Peel Adhesion to Concrete | ASTM D903:1998 | 1500 N/m |
| Lap Peel Adhesion | ASTM D1876:2008 | 1500 N/m |
| Joint Shear Strength | ASTM D6392:2025 | 15000 N/m |
| Lateral Water Migration up to 7 bar (71.4 m) | ASTM D5385:2025 | No Leakage |
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