PR-1198 is a sprayable polyurethane coating designed for use as a secondary fuel barrier on aircraft integral fuel tanks. It is typically applied to the exterior surfaces of the center wing box tank; should a leak occur in the tank's primary seal system, PR-1198 aids in containment of the leak and prevents fuel migration. It cures at room temperature to form a resilient, transparent coating with high elongation and tensile strength.
Typical Properties
- The following test values are in accordance with BMS 5-81 Type II Class 3
- Mix ratio (A:B): 55:100 by weight; 50:100 by volume
- Application life (<10,000 cps): 45–75 minutes
- Tensile strength (7 days cure at 25 °C, 50% RH): 2000 psi (13 MPa)
- Elongation (7 days cure at 25 °C, 50% RH): 400%
Application
- Clean primed surfaces with solvent immediately before application
- For maximum performance, apply unthinned by brush or airless spray
- Permits a 10–20 mil (0.25–0.50 mm) wet film build on vertical surfaces
Cure
- At 0.25–0.50 mm wet film, 25 °C (77 °F): tack free time 3 hours, cure time 24 hours
- At 66 °C (150 °F): tack free time 1 1/2 hours, cure time 2 hours
Packaging and Shelf Life
- Supplied in two-part can kits
- Storage life is at least 6 months when stored below 32 °C (90 °F) in original, unopened containers
| Packing | 1 QT |