Pre-applied HDPE Self-adhesive Waterproof Membrane
High-performance pre-applied HDPE membrane with chemical bond for underground concrete structures. Eliminates lateral water migration.
Key Specifications
Product Overview
A pre-applied high-density polyethylene (HDPE) self-adhesive waterproofing membrane. Consists of a high-density polyethylene base sheet, a non-bitumen environmental high-polymer self-adhesive layer, and a protective layer (available with a white/yellow sand finish or an adhesive PET release film). This product is specifically designed for underground structures, subway stations, and civil foundation projects. It forms a continuous, permanent chemical bond with poured concrete, effectively eliminating lateral water migration.
Key Benefits
- Lateral Water Tracking Prevention: Prevents lateral water tracking by establishing a continuous, permanent chemical bond with the cast-in-place concrete as it cures.
- Superior Mechanical Performance: High mechanical performance, including exceptional tensile strength, elongation, and superior tear and puncture resistance.
- Corrosion Resistance: Excellent resistance to acids, alkalis, salts, and other corrosive underground environmental substances.
- Dimensional Stability: Good low-temperature flexibility and outstanding dimensional stability across varying construction conditions.
- Safe Installation: Safe, quick, and flame-free cold-applied installation with a reliable self-adhesive overlap selvage.
Technical Specification Table
| Attribute | Specification |
|---|---|
| Tensile Strength | >= 16.0 MPa |
| Elongation at Break | >= 400% |
| Peel Strength | >= 1.5 N/mm (to concrete) |
| Low Temp Flex | -25 deg C, no cracks |
| Water Impermeability | 0.3 MPa for 120 min, no leakage |
| Puncture Resistance | >= 350 N |
| Standards | GB/T 23457-2009 |
Applications
- Underground foundation slabs and blind-side wall waterproofing
- Subway stations, rail transit tunnels, and underground utility corridors
- Industrial basements and municipal civil engineering projects
- Water conservancy, tunnels, and deep underground excavation structures
Surface / Thickness / Roll Size Options
- Surface Finishes: White Sand Surface, Yellow Sand Surface, Adhesive PET Release Film
- Thickness Options: 1.2 mm, 1.5 mm, 2.0 mm
- Width Options: 1.0 m, 2.0 m
- Length Options: 10m, 15m, 20m/roll
Installation Method
Pre-applied (blind-side) waterproofing method. Roll out the HDPE membrane onto the prepared substrate (mud slab or retaining wall) with the self-adhesive/sand layer facing up (towards the concrete pour). Lap joints must be tightly bonded using the self-adhesive selvage and rolled firmly. Position reinforcement rebars directly over the membrane. Pour the concrete mix; as it cures, a permanent mechanical and chemical bond is established between the membrane and the concrete.
Packaging & Loading
Selling unit: Single roll. Approx. 10,000 to 12,000 square meters per 20ft container (subject to thickness and width). Securely wrapped for export.
Storage & Shelf Life
Rolls must be stored horizontally in an upright, dry, well-ventilated warehouse away from heat sources and direct sunlight. Shelf life is 12 months.
OEM / Private Label Options
Customized packaging, logo printing, graphic customization, and custom colors are available (Min. order 2,000 sqm).
FAQ
- MOQ: 1,000 square meters
- Samples: Free samples available
- Lead time: 7-15 days
- Payment: T/T, L/C
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