Formulated for draft, smoke, and fireblocking applications in single family residential construction, Flame Tech FB is recognized by UL as alternative fireblocking material and colored orange to facilitate inspection. Closed cell insulating foam sealant expands up to 3 times original bead size to seal off gaps and voids around wires, pipes, ducts, and similar openings. Tack-free in as little as 10 min, Flame Tech FB is cuttable after 1 hour and fully cures in 12–24 hours.