Fire Foam B1 is a quick setting fire rated one part polyurethane foam. Once cured the foam can be cut, sawn, or plastered over after only one hour. Aerosol based foam. Meets requirements of BS476 Part 20 (1987) Class B1 for construction materials. Insoluble in water. Highly viscous. Flash point: -4øC. Stable under normal conditions.
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