3M Fire Barrier Sealant CP 25WB+, Red, 5 Gallon (Pail), 1 Each/Case

• 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 Barrier

The 3M Fire Barrier Sealant CP 25WB+ is a reliable firestop solution designed to protect buildings from fire and smoke. This red, latex-based sealant forms a monolithic firestop seal that expands when exposed to heat, helping maintain fire resistance for up to 4 hours.

Its one-component formula makes it easy to apply without mixing, ensuring consistent performance. The CP 25WB+ model is part of 3M’s trusted line of fire protection products, known for quality and durability in commercial and residential settings.

Effective 5 Gallon Pail

This fire barrier sealant comes in a convenient 5 gallon pail, ideal for large projects or multiple applications. The pail format allows for easy storage and use with conventional caulking equipment, making it practical for contractors and installers.

Having 1 each per case ensures you receive a full pail ready for immediate use. This packaging supports efficient job site management and reduces downtime during application.

Strong Adhesion Properties

CP 25WB+ offers sag-resistant properties that provide clean application and strong adhesion on both walls and floors. This ensures the sealant stays in place, maintaining the integrity of fire-rated assemblies over time.

Its ability to adhere well to a variety of substrates and penetrants makes it versatile for use in static construction joints and through-penetration firestop systems, enhancing overall fire protection.

Sound Minimizing Sealant Benefits

Beyond fire protection, this sealant also helps minimize sound transfer, improving acoustic performance in buildings. It has an STC rating of 54 when tested in a rated wall assembly, making it suitable for environments where noise control is important.

This dual function supports safer and quieter spaces, especially in commercial and residential buildings where both fire and sound barriers are critical.

Water-Based Re-Enterable Sealant

The water-based formula of the 3M Fire Barrier Sealant CP 25WB+ allows for easy application and clean-up. It is paintable, re-enterable, and repairable, providing flexibility for future maintenance or modifications.

This feature reduces labor costs and downtime, making it a practical choice for ongoing building management. The sealant’s red color also helps with visual inspection and quality control on site.