3M Fire Barrier Moldable Putty Stix MP+ 1.45 in x 6 in 12/case

A one-part, ready-to-use, re-enterable, intumescent putty that can be easily formed to firestop through penetrations and blank openings in fire-rated assemblies. Often used to fill voids in large openings and/or complex firestop systems. Provides up to 4-hours of fire protection. Dark red moldable putty stick.