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

MMMCP-25WB+20OZ FIRE BARRIER SEALANT CP 25WB+ IS A ONE-COMPONENT LATEX-BASED INTUMESCENT SEALANT THAT DRIES TO FORM A MONOLITHIC FIRESTOP SEAL. THIS SEALANT ALSO ACTS AS A BARRIER TO AIRBORNE SOUND TRANSMISSION. AS PENETRANTS ARE EXPOSED TO FIRE THE INTUMESCENT PROPERTY OF THIS MATERIAL ALLOWS THE SEALANT TO EXPAND AND HELP MAINTAIN A FIRESTOP PENETRATION SEAL FOR UP TO 4 HOURS. THIS SEALANT IS DESIGNED TO HELP CONTROL THE SPREAD OF FIRE SMOKE AND NOXIOUS GASES BEFORE DURING AND AFTER EXPOSURE TO A FIRE WHEN INSTALLED IN ACCORDANCE WITH A LISTED THROUGH-PENETRATION OR FIRE-RESISTIVE JOINT ASSEMBLY SYSTEM (STC-RATING OF 54 WHEN TESTED IN A STC 54-RATED WALL ASSEMBLY). 3M FIRE BARRIER SEALANT CP 25WB+ FIRESTOPS BLANK OPENINGS AND PENETRATIONS PASSING THROUGH FIRE-RATED FLOOR FLOOR/CEILING OR WALL ASSEMBLIES AND OTHER FIRE-RATED INTERIOR BUILDING CONSTRUCTION. THIS HALOGEN-FREE SEALANT IS CAPABLE OF EXPANDING A MINIMUM OF 3 TIMES ITS DRIED VOLUME WHEN EXPOSED TO TEMPERATURES ABOVE 1000F (538C). WE ENGINEERED THIS SAG-RESISTANT SEALANT TO EXHIBIT STRONG ADHESION TO A FULL RANGE OF CONSTRUCTION SUBSTRATES AND PENETRANTS. APPLIED WITH CONVENTIONAL CAULKING EQUIPMENT THIS GUN-GRADE SEALANT OFFERS AN EXCELLENT CAULK RATE - NO MIXING IS REQUIRED. IN ADDITION THIS WATER-BASED SEALANT IS PAINTABLE AS WELL AS RE-ENTERABLE AND REPAIRABLE OFFERING EASY APPLICATION AND CLEAN-UP MMM