Flexible Polyurethane Adhesive for FRP
Key Features
- Ultra-high elongation (>200%) for maximum flexibility
- Very low modulus (0.5–1.5 MPa) for stress distribution
- Outstanding cold temperature performance to -50°C
- High T-peel strength (≥8 kN/m)
- 1:1 mix ratio for easy proportioning
This flexible polyurethane adhesive is a high-elongation, low-modulus PU system designed for bonding FRP panels and assemblies where maximum flexibility and dynamic load absorption are required. Elongation at break exceeds 200%, Shore A hardness is 40–60, and T-peel strength exceeds 8 kN/m. The very low modulus (0.5–1.5 MPa) distributes stress uniformly over large bond areas, preventing stress concentration at joint edges. 1:1 mix ratio. Open time 30–40 min at 23°C. Full cure 4–12 hours. Service temperature -50°C to +80°C with excellent cold temperature flexibility (-50°C impact peel retention >70%). Ideal for bonding flexible composite sandwich panels, decking, and assemblies subject to severe thermal cycling, impact, and panel flutter. The low modulus also provides vibration isolation between bonded structures. Bonds GRP, FRP, plywood, aluminum, and foams without priming in most cases.
Specifications
| Parameter | Value |
|---|---|
| Service Temp | -50°C to +80°C |
| Elastic Modulus | 0.5–1.5 MPa |
| Mix Ratio (vol) | 1:1 |
| T-Peel Strength | ≥ 8 kN/m |
| Shore A Hardness | 40–60 |
| Open Time (23°C) | 30–40 min |
| Elongation at Break | > 200% |
Applications
FAQ
Use flexible PU when: differential thermal movement between bonded substrates is large (>1% of bond length); the bond must accommodate continuous vibration or dynamic panel flex; the service temperature range is very wide (-50°C to +80°C); or maximum peel and impact resistance is the priority. Use standard PU when higher shear strength and stiffer joint behavior are needed while still requiring more flexibility than MMA or epoxy.
Direct Contact
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