Fire Barrier Putty Pad, Size 7-1/2 In.L x 7-1/2 In.W, Red, Container Type PadUp to 4 hr. Fire Rating, Material Intumescent, Standards ASTM E814 (UL1479) RestrictionsCalifornia Proposition 65 Warning: This product contains a chemical known to the State of California to cause cancer. Fire Barrier Products(D) Putty, Putty Pads, and Putty SticksFlexible putty has intumescent and endothermic properties and molds easily into penetrations. Pads provide easy application to electrical boxes or other penetrations. Putty sticks stay pliable and allow easy access for cable mining at a later time.UL Classified and FM Approved.