3M MPP-7X7 Putty Pad Fire Barrier Moldable 7 in Lx 7 in W 1/8 in

A one-part, ready-to-use, re-enterable, intumescent putty that can be easily formed to firestop metallic and non-metallic electrical boxes in, wall-openings and through penetrations in fire-rated assemblies. Provides up to 4-hours of fire protection. 7x7 inch dark red moldable pad (177.8 mm x 177.8 mm). Protective and moldable putty that helps prevent the spread of fire, smoke and noxious gas. Acts as a draft and cold smoke seal for systems with L-Ratings. In addition to its fire-resistant properties, the 1/10th inch (2.5 mm) thick pads have airborne sound reduction characteristics which helps minimize sound transmission through assemblies requiring an STC rating.