Fire Barrier

Firestop Sealants, Putty and Foam for Fire-Rated Construction

Stop fire, smoke and toxic gas in their tracks with FindTape's Fire Barrier collection. These firestop sealants, putty sticks and expanding foams seal penetrations, joints and openings in fire rated walls, floors and ceilings, giving your building lasting protection when it matters most.

FindTape's Fire Barrier lineup keeps fire, smoke and noxious gas from spreading through the gaps that every building has. Whether you're sealing a blank opening, wrapping a bundle of cables or filling the space around a pipe penetration, these firestop products are built to hold the line in fire rated floors, walls and joints.

3M Fire Barrier Sealant CP 25WB+ is a one component, latex based, intumescent sealant that goes on easily with standard caulking equipment and dries into a tough, monolithic firestop seal. When exposed to heat, it expands to help maintain a fire stop seal for up to 4 hours, and it doubles as a sound barrier with an STC rating of up to 54. It's water based, paintable, re-enterable and repairable, so touch ups and inspections stay simple.

For gaps around cables, conduit and insulated pipe, 3M MP+ Fire Barrier Moldable Putty Stix is a dark red, one part putty that molds by hand into any shape you need. It firestops for up to 4 hours, helps block drafts and cold smoke, and carries an STC rating of up to 56 for extra quiet. Since it never dries out or crumbles, you can pull it back open for future work and reseal it just as easily.

3M Fire Block Foam is the go to choice for non-rated residential and commercial fire blocking. This foam in place formula expands up to 200% to fill gaps fast, bonds to concrete, brick, metal, wood, plastic and cable jacketing, and is tack free in about 5 minutes. It meets IBC and IRC fire blocking requirements and holds up to heat as high as 240°F.

These fire barrier products are trusted by contractors, electricians and building owners across construction, HVAC and facilities maintenance projects. Stock up today and keep your next job code compliant and ready for anything.

If you're looking for an adhesive product or tape to do a specific job, try our Advanced Tape Finder. This tool allows you to narrow down your search based on adhesive type, removability, peel adhesion, thickness, and other specifications. You can also visit our Shop by Department page to find the best tapes for your specific application or industry.

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