We formulated this fire sealant to dry and form a monolithic firestop seal that also acts as a barrier to airborne sound transmission. 3M™ Fire Barrier Sealant CP 25WB+ is a red, one-component, gun-grade, latex-based, intumescent firestop sealant. This fire barrier sealant helps control the spread o

3M 7000006379 WE FORMULATED THIS FIRE SEALANT TO DRY AND FORM A MONOLITHIC FIRESTOP SEAL THAT ALSO ACTS AS A BARRIER TO AIRBORNE SOUND TRANSMISSION. 3M™ FIRE BARRIER SEALANT CP 25WB+ IS A RED ONE-COMPONENT GUN-GRADE LATEX-BASED INTUMESCENT FIRESTOP SEALANT. THIS FIRE BARRIER SEALANT HELPS CONTROL THE SPREAD OF FIRE SMOKE AND NOXIOUS GASES BEFORE DURING AND AFTER EXPOSURE TO A FIRE.