Product Description
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. Applied with conventional caulking equipment, this gun-grade sealant offers an excellent caulk rate and is easy to handle; 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.
Key Benefits
- Up to 4 Hour Firestop: Tested for through penetration applications in accordance with ASTM E814 (UL 1479) and CAN/ULC-S115.
- Intumescent Expansion: Expands up to 3 times its dried volume when exposed to high temperatures (up to 1000°F / 538°C).
- Sag Resistant: Allows for clean application in vertical and overhead conditions.
- Excellent Adhesion: Bonds to concrete, metals, wood, and plastics.
- Re-enterable and Repairable: Allows for easy future modifications or repairs.
- Paintable: Water-based formula allows for easy finishing.
- Sound Transmission Barrier: Helps reduce airborne sound transfer through penetrations (STC-Rating of 54).
Best For
- HVAC ducts and vents
- Metallic and non-metallic pipes
- Blank openings
- Single and bundled cables
- Floor/ceiling assemblies
- Fire-rated interior building construction
Product Properties
| Property | Specification |
|---|---|
| Application | Fire-Rated Floor, Wall, and Ceiling Penetrations |
| Brand | 3M™ |
| Fire Rating | Up to 4 Hours |
| Product Form | Sealant |
| Material | Latex-based Intumescent |
| Expansion | Up to 3 times dried volume |
| Temperature Resistance | Up to 1000°F (538°C) |
| STC Rating | 54 |
| Paintability | Yes |
| Re-Enterable | Yes |
