3M™ Fire Barrier Sealant CP 25WB+, Red, 10.1 fl oz Cartridge, 12/case, Restricted
Features
- Water-based and paintable sealant provides easy application and clean-up
- 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
- Fire resistance tested for static construction joint systems in accordance with ASTM E 1966 (UL 2079)
- Sealant is re-enterable and repairable
Manufacturer Resources
3M Fire Barrier Sealant CP 25WB+ Technical Data Sheet
Product Specs
- Color Family:
- Red
- Fire Rating:
- 4 Hour
- Product Color:
- Red
- Product Number:
- CP 25WB+
- Product Type:
- Fire Barrier Sealant
- Department:
- Electrical
- Product Group:
- Jobsite Supplies
- Product Subgroup:
- Sealants
3M 7010353050 – Frequently Asked Questions
1) What fire rating does 3M Fire Barrier Sealant CP 25WB+ carry for through penetrations?
CP 25WB+ is firestop tested for through penetration applications up to 4 hours in accordance with ASTM E814 (UL 1479) and CAN/ULC-S115. The 4 hour rating is what lets it be used on rated wall and floor penetrations where the assembly itself carries up to a 4 hour rating. The specific hourly rating on your opening comes from the UL system number you build to, so match the penetrant, opening size and annular space to a listed system.
2) Can 3M CP 25WB+ firestop sealant be used on construction joints, not just penetrations?
Yes. Along with through penetrations, CP 25WB+ is fire resistance tested for static construction joint systems in accordance with ASTM E1966 (UL 2079). Static is the key word: it covers joints that are not designed to cycle with movement. For a head-of-wall or expansion joint expected to move, use a joint spray or sealant qualified for that movement class instead.
3) If we add another cable through a firestopped sleeve later, do we have to cut out the old sealant?
No. CP 25WB+ is re-enterable and repairable, so you can cut into the existing seal to pull additional cable or conduit and then patch it back with fresh sealant rather than tearing out the whole penetration. That is the main reason it gets specified on telecom and electrical risers where cable counts keep growing.
4) Will red firestop caulk show after the drywall is finished, or can it be painted over?
CP 25WB+ is a water-based, paintable sealant, so it takes paint once cured and can be hidden in finished areas. The red color is deliberate, it lets an inspector or the AHJ see at a glance that a rated penetration was firestopped, so many jurisdictions and building owners prefer it left visible in plenums, shafts and above-ceiling work.
5) Can 3M CP 25WB+ be applied overhead in a floor penetration without sagging out?
It is sag-resistant, which is what makes it workable in both wall and floor assemblies including overhead application, and it bonds well to the substrate in both orientations. Being water-based, cleanup while wet is done with water rather than solvent.
6) Does 3M Fire Barrier Sealant CP 25WB+ help with sound between units?
The sealant helps minimize sound transfer through the penetration, which matters in multi-family and hotel work where a poorly sealed sleeve is the flanking path that kills an otherwise good STC wall. Treat it as a benefit of a properly filled penetration, not a substitute for the acoustic assembly itself.
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Does the 3M 7010353050 come with a warranty?
Absolutely. The 3M 7010353050 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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