Firestopping medium to large openings containing various penetrating items such as pipes, conduits, cables, insulated metal pipes, bus ducts and HVAC ducts.
Intumescent: expands in all directions for a tough, tight seal., Re-installable - easy retrofitting of cables., Heat-sealed poly bag: strong & durable, no sewn seams to unravel or tear, no irritating fiberglass., Shelf life: no limit.