Waterproofing
SelfSeal HDPE 120 SC
SelfSeal HDPE 120 SC
Sand Coated HDPE Membrane
A factory-manufactured HDPE sheet membrane with a sand-coated surface designed for below-ground waterproofing applications. The membrane provides a physical barrier against water ingress and lateral water migration while offering excellent puncture resistance and long-term durability. Suitable for basement slabs, podium decks and underground structures.
Features and Benefits
- Pre-applied and fully bonded waterproofing system forms a continuous bond with poured concrete.
- Self-adhesive technology enables fast and efficient installation.
- Excellent resistance to water ingress and lateral water migration.
- High tensile strength and exceptional elongation for accommodating substrate movement.
- Outstanding puncture resistance for enhanced durability during construction.
- High peel adhesion to concrete and strong lap adhesion at joints.
- High resistance to hydrostatic pressure.
- Consistent factory-controlled thickness.
- 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 | 1.2 mm |
| Pure HDPE Thickness | ASTM D3767:2003 | 0.9 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 | 1000 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 |
| Lateral Water Migration up to 7 bar (71.4 m) | ASTM D5385:2025 | No Leakage |
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