Product Manuals
1. Introduction
Polyurea is a high-performance, two-component, spray-applied elastomer created by the rapid reaction of isocyanates and amine-terminated resins. It is applied with plural-component hot spray machines and cures within seconds, forming a seamless, joint-free, highly elastic, and chemically resistant waterproofing layer.
Polyurea is considered the gold standard for heavy-duty waterproofing where extreme durability, chemical resistance, and tensile strength are required.
2. Advantages
- Ultra-fast curing (walkable within 3-5 secs).
- High elongation (>600%) + tensile strength (>15 MPa).
- Seamless, joint-free finish (spray applied).
- Superior chemical resistance (ETPs, STPs, industrial floors).
- Excellent abrasion and impact resistance.
- Outstanding crack bridging (≥3 mm).
- UV-resistant topcoat available for exposed conditions.
- Long service life (15–20+ years).
3. Limitations
- Requires expensive plural-component spray equipment.
- Needs skilled applicators (trained crews).
- Higher cost than PU or cementitious.
- Substrate preparation is critical (shot blasting/grinding + primer).
- Sensitive to substrate moisture unless correct primers are used.
4. Recommended Use Cases
- Effluent Treatment Plants (ETPs) & Sewage Treatment Plants (STPs) → chemical, biological, and continuous immersion exposure.
- High-area terraces & podiums → rapid application + long service life.
- Industrial floors & tank linings → chemical & abrasion resistance.
- Water-retaining structures → reservoirs, tunnels, aqueducts.
- Bridge decks, parking decks → heavy vehicular loads.
5. Performance Parameters
Property | Typical Polyurea Values | Standard |
Tensile Strength | ≥15–20 MPa | ASTM D412 |
Elongation | ≥800% | ASTM D412 |
Tear Strength | ≥70 kN/m | ASTM D624 |
Shore Hardness | 85–95 (A/D scale depending on grade) | ASTM D2240 |
Crack Bridging | ≥3 mm | ASTM C836 |
Abrasion Resistance | <50 mg loss | ASTM D4060 |
Hydrostatic Pressure Resistance | ≥10 bar | ASTM D5385 |
Chemical Resistance | Excellent (alkalis, effluents, mild acids) | ASTM D543 |
Potable Water Suitability | NSF/BS 6920 certified grades available | NSF/EN 1508 |
6. Application Methodology
- Surface Preparation → Shot blasting or mechanical grinding; substrate must achieve CSP 3–4 (ICRI profile).
- Primer → Apply moisture-tolerant epoxy or PU primer; sprinkle silica sand for key.
- Spray Application → Plural-component spray machine, pre-heated hoses; apply polyurea in multiple passes to achieve 2–3 mm DFT.
- Detailing → Reinforce joints, penetrations, and corners with geotextile or pre-strips.
- Topcoat (if exposed) → UV-resistant aliphatic PU topcoat applied within 24 hrs.
5. Video Masterclass
SpecX Masterclass: Polyurea Membranes — Coming Soon
Disclaimer
SpecX is an industry initiative & a neutral resource, compiled from industry references and best practices. It is not brand-specific. Always cross-check with project requirements and local codes before finalizing specifications.