We formulated this fire sealant to dry and form a monolithic firestop seal that also acts as a barrier to airborne sound transmission. 3MÂ™ 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.
3M™ 051115-11642 High Performance Fire Barrier Sealant, Sausage Pack, Composition: Sodium Silicate, Water, Zinc Borate 2335, Polymer, Ethylhexyldiphenyl Phosphate, Iron Oxide, Oxide Glass Chemicals, Polyethylene Glycol, Quartz Silica, 4 hr Fire Rating, Red
3M™ fire barrier sealant cP 25WB+ is a high performance ready-to-use, gun-grade, latex based, intumescent sealant that dries to form a monolithic firestop seal that also acts as a barrier to airborne sound transmission. 3M™ fire barrier sealant cP 25WB+ helps control the spread of fire, smoke and noxious gasses before, during and after exposure to a fire when installed in accordance with a listed through penetration or fire-resistive joint assembly system. 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. The unique intumescent property of this material allows 3M™ fire barrier sealant cP 25WB+ to expand and help maintain a firestop penetration seal for up to 4 hours as penetrants are exposed to fire. 3M™ fire barrier sealant cP 25WB+ exhibits excellent adhesion to a full range of construction substrates and penetrants. No mixing is required.