A two-component spray elastomer for project waterproofing and protective lining. Choose pure polyurea or a polyurethane–polyurea hybrid by the required mechanical performance, setting time and finished assembly. Both need matched A+B materials, heated plural-component equipment and a prepared substrate.
Grade Options
Pure polyurea / polyurethane–polyurea hybrid
Spray Equipment
Heated, high-pressure A+B proportioning unit
Project Uses
Bridge decks, tunnels and containment
For project-specific pricing, send your technical requirements and destination port.
Spray polyurea is a reactive A+B membrane installed with heated plural-component equipment. Pure polyurea and polyurethane–polyurea hybrid have different performance indices and may require different operating settings. A procurement comparison should therefore name the grade, intended assembly and acceptance criteria before comparing unit prices.
The pure grade is listed at 100% solid content, ≥20 MPa tensile strength and ≥600% elongation. The hybrid is listed at ≥98% solids, ≥22 MPa tensile strength and ≥500% elongation. These are separate product profiles rather than one combined claim. Grade selection also depends on substrate preparation, primer, detailed junctions, film thickness and the finish or protection above the membrane.
For a firm quotation, state the coated area, substrate, design dry-film thickness, exposure, available spray equipment and destination port. Ask for matched A+B quantities and the current grade-specific technical documents. A rapid gel time alone does not establish when a bridge deck, floor or tank can return to service.
A continuous spray membrane can follow deck geometry and details beneath a designed protection or surfacing system. Confirm concrete preparation, primer, bond to the overlay and traffic-loading requirements for the selected assembly.
The spray process reaches curved surfaces and penetrations without sheet laps. Specify the substrate condition, crack and joint treatment, drainage and protection before choosing the membrane grade.
A seamless lining can be considered for basins and engineered containment. Water chemistry, immersion, cleaning and any drinking-water contact require separate project-specific approvals and test documents.
Select abrasion and impact requirements for plant floors or other protected industrial surfaces. A suitable primer, slip-resistant finish and chemical-exposure assessment may be needed; the base membrane alone is not a complete floor system.
Pure polyurea is listed at 100% solids, ≥20 MPa tensile strength and ≥600% elongation. The hybrid is listed at ≥98% solids, ≥22 MPa tensile strength and ≥500% elongation. Select the grade against the project target rather than assuming one is universally better.
The pure-grade no-flow figure is 15±2 seconds at 55–65°C material temperature; the hybrid gel index is ≤40 seconds. These values describe initial reaction, not automatic permission for foot traffic, overlay, immersion or chemical exposure.
Spraying forms a membrane over changes of plane and around details. Junctions, terminations, primer compatibility and the next layer still need design and site inspection to avoid weak interfaces.
Tensile, elongation, tear, hardness and low-temperature figures are separated by grade below. The installed work should additionally be checked for coverage, dry-film thickness, pinholes and substrate adhesion.
Pure polyurea — product performance indices
| Test Item | Unit | Test Condition | Project Index |
|---|---|---|---|
| Solid content | % | Pure grade | 100 |
| Viscosity | cP | 25°C | 400–1500 |
| Mixing ratio | A:B by volume | Pure grade | 1:1 |
| No-flow time | s | Material at 55–65°C | 15 ± 2 |
| Surface drying time | s | Maximum | ≤120 |
| Tensile strength | MPa | Minimum | ≥20 |
| Elongation at break | % | Minimum | ≥600 |
| Tear strength | N/mm | Minimum | ≥45 |
| Hardness | Shore A | Pure grade | 92 ± 5 |
| Abrasion loss | mg | Pure grade | ≤50 |
| Low-temperature flexibility | °C | No cracks | −35 |
| Normal-use temperature range | °C | Pure grade | −45 to 120 |
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| Test Item | Unit | Test Condition | Technical Index |
|---|---|---|---|
| Solid content | % | Hybrid grade | ≥98 |
| Gel time | s | Maximum | ≤40 |
| Surface drying time | s | Maximum | ≤120 |
| Drying time | h | Hybrid grade | 24 |
| Tensile strength | MPa | Minimum | ≥22 |
| Elongation at break | % | Minimum | ≥500 |
| Tear strength | kN/m | Hybrid grade | 80 |
| Hardness | Shore A | Hybrid grade | 80 |
| Abrasion loss | mg | 750 g / 500 revolutions | 25 |
| Bond strength | MPa | Hybrid grade | 3.34 |
| Water absorption | % | Hybrid grade | 0.40 |
| Low-temperature flexibility | °C | No cracks | −35 |
| VOC content | g/L | Hybrid grade | 0 |
| Normal-use temperature range | °C | Hybrid grade | −45 to 120 |
| Theoretical material consumption | kg/m² | At 1 mm film thickness | 1.1–1.2 |
Confirm concrete or steel condition, the primer, required dry-film thickness, details and the protection or wearing layer. Check whether the project needs UV-stable appearance, immersion resistance or a specific chemical-resistance test.
Remove laitance, loose material, oil and dust; repair defects and profile the surface for adhesion. Check moisture and dew point against the selected primer and application documents. Mask adjacent work before spraying.
Use suitable heated, high-pressure plural-component equipment. Verify the selected grade's A:B ratio, component temperatures, pressures and hose condition before a trial spray. Keep the components separate until the spray gun.
Treat corners and penetrations first, then build the specified layer in controlled passes. Check dry-film thickness, pinholes and adhesion as required. Release for overcoating, traffic or immersion only after the project acceptance criteria are met.
Provide the grade, coated area, target thickness, substrate and destination port. Request both component quantities, current pack sizes, spray settings and shipment arrangement in one quotation.
Ask for the current grade-specific TDS, safety data, test report and installation instructions. If the project cites GB/T 23446-2025 or a local approval, confirm the applicable type and available evidence for the offered formulation.
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