3M Fire Barrier Sealant CP 25WB+, Red, 2 Gallon (Pail), Drum

• Fire resistance tested for static construction joint systems in accordance with ASTM E 1966 (UL 2079)
• Firestop tested for through penetration applications up to 4 hours in accordance with ASTM E814 (UL 1479) and CAN/ULC-S115
• Sag-resistant properties offer clean application as well as strong adhesion in both wall and floor applications
• Sealant helps minimize sound transfer
• Sealant is re-enterable and repairable
• Water-based and paintable sealant provides easy application and clean-up

3M 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 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.

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).

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

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.

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.

Trusted 3M Fire Protection

The 3M Fire Barrier Sealant CP 25WB+ is a reliable firestop solution designed to control fire, smoke, and noxious gases. This one-component, latex-based sealant forms a monolithic firestop seal, ensuring safety in various construction settings.

Its tested fire resistance meets ASTM E 1966 (UL 2079) standards, making it suitable for static construction joint systems. The brand's reputation guarantees consistent performance in demanding firestop applications.

Effective Fire Resistance Sealant

This sealant offers firestop protection for through-penetration applications up to 4 hours, complying with ASTM E814 (UL 1479) and CAN/ULC-S115. Its intumescent property expands during fire exposure to maintain the firestop seal.

Designed for use in rated wall, floor, and floor-ceiling assemblies, the CP 25WB+ helps maintain fire integrity in critical building areas. Its red color and 2-gallon pail format make it easy to identify and apply on site.

Sag-Resistant Easy Application

The CP 25WB+ sealant is sag-resistant, providing clean application and strong adhesion on walls and floors. This quality ensures a neat finish and reliable seal without dripping or sagging during installation.

Its water-based, paintable formula allows for easy cleanup and finishing. The 2-gallon pail format supports efficient use on larger projects, reducing the need for frequent refills.

Sound Minimizing Sealant Benefits

Besides fire protection, this sealant helps reduce sound transfer, improving acoustic performance in buildings. Its ability to act as a barrier to airborne sound makes it ideal for commercial and residential applications.

The sealant is re-enterable and repairable, allowing maintenance without full replacement. This feature extends the product’s lifespan and supports long-term building performance.

Large Format Pack Size

Supplied in a 2-gallon pail, the CP 25WB+ offers a practical size for contractors and builders. This pack size balances ease of handling with enough volume for medium to large firestop jobs.

The drum format supports consistent application rates and reduces waste. It’s compatible with conventional caulking equipment, making it a convenient choice for firestop installations.