From: RHH Foam Systems Inc.

RHH Foam Systems inhibits the passage of fire through residential utility penetrations, blocking flames and smoke, with Versi-Block. The one-component polyurethane foam sealant creates a durable, airtight and waterproof seal that stops air infiltration. Providing high insulation value, the sealant is bright orange for easy identification of an approved fire block. It is suitable for applications like basement areas; attic areas; around cables, pipes, vents and duct penetrations. 

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