Cold Wet Laid Construction Polyethylene Waterproofing Membrane No Leakage 50m/Roll
Polyethylene‑polypropylene Composite Waterproof Membrane With Cold Wet‑laid Construction
Product Advantages
1. Long-lasting anti-aging performance. Made of pure polymer resin without asphalt. With anti-aging and anti-oxidation additives, it resists soil acid-alkali and groundwater corrosion, no pulverization or cracking when buried underground.
2. Excellent impermeability. Dense polyethylene core layer prevents water penetration and moisture return, integrally formed without splicing leakage risks.
3. High toughness, crack-resistance and puncture-resistance. Adapts to minor base settlement and deformation, withstands external damage during construction.
4. Safe cold wet-laid installation. No open-fire hot melting required. Can be applied on damp substrates, suitable for poorly-ventilated enclosed areas.
5. Firm bonding with cement mortar. Polypropylene non-woven surface interlocks with cement slurry, effectively avoiding hollowing, delamination and water channeling.
6. Low substrate requirements, high fault tolerance, easy construction and less rework cost.
7. Eco-friendly, formaldehyde-free, non-toxic, no harmful emissions, safe for drinking-water tank and residential projects.
8. Wide range of applications for basement, roof, bathroom, water tank, sewage tank, tunnel, foundation damp-proof and renovation projects.
| No. | Item | Requirement |
| 1 | Tensile Strength at Break (Ambient Temp.) | ≥60 N/cm |
| 2 | Tensile Strength at Break (60℃) | ≥30 N/cm |
| 3 | Elongation at Break (Ambient Temp.) | ≥400% |
| 4 | Elongation at Break (-20℃) | ≥300% |
| 5 | Tear Strength | ≥20 N |
| 6 | Water Impermeability (30min) | 0.3 MPa,No leakage |
| 7 | Low-temperature Flexibility | -20℃,No crack |
| 8 | Thermal Expansion — Elongation | ≤2 mm |
| 9 | Thermal Expansion — Shrinkage | ≤4 mm |
| 10 | Composite Strength (Surface & Core Layer) | ≥0.8 MPa |
Instructions for Use
1. Substrate requirement: Base surface shall be solid, free of loose sand and sharp protrusions. Damp surface is acceptable, but standing water shall be removed. Internal and external corners shall be chamfered.
2. Adhesive material: Use cement mortar mixed with special bonding powder. Hot-melt heating is forbidden.
3. Construction steps: Prepare cement adhesive slurry. Apply slurry both on base and non-woven side of membrane. Lay membrane and roll to expel air. Lap joint width ≥100 mm, coat mortar on laps and press tightly. Apply additional reinforcement layers at corners, pipe roots and construction joints. Allow full curing before backfilling or protective layer construction.
4. Important notes: Bond only through polypropylene non-woven fabric side. Do not expose the membrane outdoors without protective covering. Not an independent root-resistant membrane for green roof. Avoid construction below -5℃ or in heavy rain. Protect finished waterproof layer from sharp impact. Store in cool and ventilated place, avoid long-term UV exposure.
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