Polyurethane coatings
Spray polyurea waterproofing coating is a high-end, elastic waterproofing material characterized by a two-component (A/B) system, a solvent-free formulation, 100% solids content, and rapid curing. It is categorized into pure polyurea and semi-polyurea (polyurethane-urea) types; classified by performance into Type I (general-purpose), Type II (reinforced), and Type III (specialty); and further graded for exposed or non-exposed applications.
Key Features
✅ Exceptional Strength: Tensile strength ≥16–20 MPa, far exceeding standard coatings (liquid membranes typically rate around 1 MPa).
✅ Superior Elasticity: Elongation at break ≥450%–600%; offers outstanding resistance to cracking and structural settlement.
✅ Suitable for Long-term Outdoor Exposure: UV and aging resistant; withstands 5,000 hours of weathering without chalking or cracking; 15–20 year service life in open-air environments.
✅ Rapid Curing: Gels in 3–10 seconds; walkable after 10 minutes; allows for unlimited film thickness in a single spray application, ensuring high construction efficiency.
✅ Eco-friendly & Non-toxic: VOC ≈ 0; solvent-free; 100% solids content; safe for use in potable water tanks and fish ponds.
✅ Superior Adhesion: Bonds firmly to concrete, metal, wood, and existing membrane substrates (≥2.5 MPa).
✅ Temperature & Corrosion Resistance: Stable over a long-term range of -40°C to 120°C; resistant to acids, alkalis, salts, oils, and seawater.
Typical Applications
Roofs / Terraces / Rooftops (preferred for exposed applications)
Basements / Tunnels / Utility tunnels
Sewage treatment tanks, fire-fighting water tanks, swimming pools
Bridges, culverts, hydraulic dams
Chemical storage tanks, anti-corrosion flooring
Color-coated steel roofs, metal roof waterproofing and anti-corrosion treatment
| Test Item / Item | Technical Specifications (Type Ⅱ Exposed) / Value |
|---|---|
| Tensile Strength | ≥ 18 MPa |
| Elongation at Break | ≥ 550 % |
| Tear Strength | ≥ 50 kN/m |
| Bond Strength (Concrete) | ≥ 2.5 MPa |
| Shore Hardness (A) | 85–95 |
| Impact Resistance | 1kg·m, no cracking |
| Gel Time | 3–10 seconds (25°C) |
| Surface Dry Time | ≤ 2 minutes |
| Through Dry Time | ≤ 10 minutes (walkable) |
| Application Temperature | -40°C ~ 50°C (unaffected by humidity) |
| Application Thickness | 1.5–2.0 mm (standard for exposed roofs) |
| Theoretical Consumption | Approx. 1.8–2.2 kg/m² (for 1.5mm thickness) |
| VOC Content | ≤ 50 g/L (eco-friendly grade, pure polyurea ≈ 0) |
| Packaging | Component A: 20kg/drum; Component B: 20kg/drum (1:1 volume ratio) |
| Shelf Life | 12 months (stored sealed at 5°C ~ 35°C) |
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