The FSP creates an instant smoke- and gas-tight fire seal to fill voids around pipes, electrical conduit, data communications cables, duct work, and between walls and floors. Constructed of a blend of organic and inorganic intumescent materials, the firestop putty expands with extreme heat to prevent the spread of fire and smoke. In addition, it is acoustically tested to reduce the transmission of noise and vibration. It is pressed in place by hand and does not require special equipment.

Nelson Firestop, (800) 331-7325