What is Polyurea?
Polyurea is an advanced, spray-applied elastomeric coating created by the reaction of isocyanate and amine resin. It’s known for its extremely fast curing, high durability, and superior chemical resistance. Unlike traditional waterproofing membranes, polyurea is 100% seamless, highly flexible, and extremely long-lasting.
Key Advantages
1. Seamless Membrane: No joints, overlaps, or seams where water can penetrate.
2. Fast Cure Time: Touch-dry in 5–10 seconds, full cure in 24 hours, even in extreme temperatures.
3. Extreme Durability: Life expectancy of 25+ years under proper application.
4. High Elongation: Can stretch and return without cracking (400%+ elongation in some grades).
5. UV & Chemical Resistance: Withstands harsh sunlight, marine environments, oils, fuels, and chemicals.
6. Abrasion Resistance: Handles high foot traffic and mechanical wear.
7. Versatility: Can be applied to concrete, steel, wood, geotextiles, and more.
Application Process
1. Surface Preparation o Remove dust, oil, laitance, rust, and contaminants. o Shot blasting, grinding, or sandblasting to create a proper mechanical profile (CSP 3–5). o Repair cracks, honeycombs, or surface defects using epoxy or mortar.
2. Priming o Apply a compatible primer (epoxy/polyurethane-based) to ensure adhesion. o Moisture content in concrete should be within allowable limits.
3. Spray Application o High-pressure plural-component spray machine (e.g., Graco Reactor) used. o The two components (Part A – isocyanate & Part B – amine resin) are heated and pumped to the spray gun. o The chemical reaction is instantaneous, creating an elastomer membrane that bonds strongly to the substrate.
4. Thickness & Quality Check o Typically applied at 1.5–2.5 mm thickness for waterproofing (more for industrial coating). o Test for adhesion, dry film thickness (DFT), and pinhole detection.
Common Applications
• Roofs, podiums, and terraces
• Water tanks, reservoirs, and swimming pools
• Bridge decks and parking structures
• Industrial flooring and containment areas
• Steel structures for corrosion protection
• Marine and offshore equipment.
