3M Fire Barrier Moldable Putty

BUILDING CODE COMPLIANCE - Adheres to the back of electrical boxes to restore the rating of the fire wall
HELPS PREVENT THE SPREAD OF FIRE – dozens of CLIV “Wall Opening Protectives” UL approved configurations
LONG-LASTING FIRESTOP - firestop tested for through penetration and membrane applications for up to 4 hours in accordance with ASTM E 814 (UL 1479)
SHAPEABLE PUTTY FOR EXACTING COVERAGE – easily shape it to nooks and crannies of electrical boxes and other applications
SOUND DAMPING - acts as a barrier to airborne sound transmission and also provides draft and cold smoke seal
EXCELLENT ADHESION TO VARIETY OF MATERIALS - designed to adhere to most construction substrates, non-corrosive when applied to metal, ideal for use with listed steel or plastic electrical outlet boxes
EASY, CLEAN APPLICATION - comes ready to use in convenient 1/10 inch (2.54 mm) thick pads that are conformable by hand with no mixing or tools