3M Fire Barrier MPP+ Molda

3M(TM) Fire Barrier MPP+ 7 in X 7in Moldable Putty Pad (303) A 3/32" thick 7" x 7" pad made of synthetic elastomer designed for use as a one part, intumescent fire resistive putty used to restore the integrity of fire rated building construction. An ideal solution for putty on the outside of an electrical outlet box to receive a fire rating. Excellent adhesion.