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  • 3M™ Fire Barrier Sealant CP 25WB+
  • 3M™ Fire Barrier Sealant CP 25WB+

    3M Product Number 25WB+
    Products
    • Firestop tested for through penetration applications up to 4 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115
    • Applied with conventional caulking equipment with excellent caulk rate
    • Sag-resistant properties offer clean application as well as strong adhesion
    • Water-based and paintable sealant provides easy application and clean-up
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    • Firestop tested for through penetration applications up to 4 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115
    • Applied with conventional caulking equipment with excellent caulk rate
    • Sag-resistant properties offer clean application as well as strong adhesion
    • Water-based and paintable sealant provides easy application and clean-up
    • Sealant is re-enterable and repairable
    • Fire resistance tested for static construction joint systems in accordance with ASTM E 1966 (UL 2079)
    • Sealant helps minimize sound transfer

    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.

    3M™ Fire Barrier Sealant CP 25WB+
    Expands when heated to seal around items consumed by fire
    Dependable and Easy-to-Use Firestop Sealant
    Tough and ready-to-use, 3M™ Fire Barrier Sealant CP 25WB+ is a high-performance, 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 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. 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).

    Ready to Protect for Consistent Results
    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 1000°F (538°C). 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.

    Superior adhesion — bonds to concrete, metals, wood, plastic and cable jacketing
    Superior adhesion — bonds to concrete, metals, wood, plastic and cable jacketing
    Recommended Applications
    • HVAC ducts and vents
    • Metallic and non-metallic pipes
    • Blank openings
    • Single and bundled cables
    • Insulated pipe
    • Pipe and cable through-penetrations
    • Busways
    • Combos
    • Rated wall, floor and floor-ceiling assemblies
    • Static construction joints
    Learn more about 3M™ Fire Barrier Sealant CP 25WB+ and other fire protection products (PDF, 3.55 Mb)

    Reliable and Affordable Fire Protection
    Effective and easy to install, 3M™ Fire Barrier Sealant CP 25WB+ is part of our family of fire protection products that offer the broadest, long-lasting solutions for a variety of commercial, industrial and residential applications. As a trusted leader in the fire protection industry, 3M offers a broad line of affordable products designed to meet the most demanding firestop requirements. Find the solution you need from the industry-preferred line of fire protection products.


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