DuoBond Composite Self-Adhesive Waterproofing Membrane
Product Overview
DuoBond Composite Self-Adhesive Waterproofing Membrane combines the best of two worlds: a robust polymer top layer (HDPE or PVC) bonded to a self-adhesive polymer modified bitumen compound. This dual-layer construction delivers exceptional puncture resistance, chemical durability, and instant torch‑free adhesion. Simply peel and stick – the bitumen layer bonds permanently to concrete, metal, or wood, while the polymer sheet provides a tough protective barrier.
Dual‑Layer Construction
Total thickness: 1.5 mm – 3.0 mm | Peel strength: ≥1.8 N/mm
Hybrid Performance
Polymer sheet provides high tensile strength (≥400 N/50mm) and puncture resistance; bitumen layer ensures perfect sealing and adhesion.
Torch‑Free Safety
Ideal for flammable substrates, confined spaces, and occupied buildings – no open flame, no fumes, no hot kettles.
Chemical Resistant
HDPE/PVC top layer resists acids, alkalis, oils, and soil contaminants – perfect for industrial and infrastructure projects.
Rapid Installation
Up to 50% faster than multi-layer systems. No curing time, no waiting for adhesives to set – immediate waterproofing.
Key Applications
| Basement & Foundation Waterproofing External walls, slabs, and below-grade structures – withstands hydrostatic pressure and aggressive soil chemicals. | |
| Tunnel & Underground Structures Cut‑and‑cover tunnels, metro stations, and underground parking – approved for no‑flame zones. | |
| Industrial Flooring & Containment Secondary containment for chemical tanks, process areas, and wastewater treatment. | |
| Bridge Decks & Infrastructure Protection layer under asphalt, resistant to de‑icing salts and mechanical loads. | |
| Plaza Decks & Green Roofs Root‑resistant option available – perfect for podium gardens and terrace waterproofing. |
Technical Specifications
| Property | Test Method | 1.5 mm | 2.0 mm | 2.5 mm |
|---|---|---|---|---|
| Tensile Strength (N/50mm) | ASTM D412 / GB 18173 | ≥400 | ≥450 | ≥500 |
| Elongation at Break (%) | ASTM D412 | ≥30 | ≥35 | ≥40 |
| Low Temperature Flexibility | ASTM D1970 | -20°C (no cracks) | ||
| Heat Resistance (2h) | ASTM D5147 | 80°C (no flow) | ||
| Peel Strength (concrete) N/mm | ASTM D903 | ≥1.8 | ||
| Self-Adhesive Lap Strength N/mm | ASTM D1876 | ≥1.2 | ||
| Puncture Resistance (N) | ASTM D4833 | ≥300 | ≥400 | ≥500 |
| Water Impermeability | ASTM D5385 | 0.6 MPa, 2h (no leak) | ||
| Chemical Resistance | ASTM D543 | Excellent (acids, alkalis, salts) | ||
| Thickness Tolerance | ASTM D3767 | ±0.1 mm | ||
Complies with ASTM D1970, GB 18173.1, and EN 13707 standards.
Project References
Why Choose DuoBond?
Two Barriers in One
Polymer sheet stops mechanical damage and chemicals; bitumen layer seals out water and vapour – complete protection.
Time Saving
Single-step application replaces primer + membrane + protection layers. Reduces labour by 30-40%.
Environmentally Safe
Low VOC, no solvents, no torches. Recyclable polymer layer. Contributes to LEED credits.