3M Fire Barrier Sealant CP 25W...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$749.64
3M Fire Barrier Sealant CP 25WB+, Red

3M Fire Barrier Sealant CP 25WB+, Red

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Model: 7000006379

In Stock (leaves warehouse same day if ordered before 3pm ET)

$749.64
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3M™ Fire Barrier Sealant CP 25WB+, Red, 20 fl oz Sausage Pack, 10/case

  • Features

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

Product Specs

Product Color:
Red
Water Tight:
No
Smoke Seal:
Yes
Etim Class 8 0:
EC000209
Fire Rating:
Up to 4 Hour
Department:
Electrical
Country Of Origin:
United States
Hardness:
45 Shore A
Product Type:
Fire Barrier Sealant
Product Group:
Jobsite Supplies
Product Subgroup:
Sealants

3M 7000006379 – Frequently Asked Questions

1) What fire rating does 3M Fire Barrier Sealant CP 25WB+ carry for through-penetrations?
CP 25WB+ is rated up to 4 hours. The sealant is firestop tested for through-penetration applications up to 4 hours in accordance with ASTM E814 (UL 1479) and CAN/ULC-S115, and it is also fire resistance tested for static construction joint systems per ASTM E1966 (UL 2079). The actual rating you get on a given opening comes from the specific UL system you build to, not from the sealant alone.
2) Will 3M CP 25WB+ firestop sealant also stop smoke through the penetration?
Yes, CP 25WB+ is a smoke seal as well as a firestop, and it also helps minimize sound transfer through the penetration. That matters in corridor and stair enclosure walls where the smoke-tightness of the barrier is inspected, not just the fire rating.
3) Can I use this 3M red firestop caulk in a wet or below-grade location?
No. CP 25WB+ is not water tight, so keep it out of standing water, exterior exposure, and below-grade locations where it can be wetted. It is a water-based product intended for interior wall and floor penetrations and static joints. For a damp or submerged condition you need a firestop product specifically listed as water resistant.
4) If I add a cable later, do I have to cut out the old CP 25WB+ and start over?
No. CP 25WB+ is re-enterable and repairable, so you can cut back into the seal to add or pull cable and then patch it with fresh sealant. That is the main reason it gets specified on communications and electrical sleeves in buildings where cable counts change.
5) Which package size of CP 25WB+ should I order for a few cable penetrations versus a whole floor of firestopping?
Three sizes are offered. The 10.1 fl oz cartridge (MPN 7000006383) fits a standard caulk gun and suits punch-list work and a handful of penetrations. The 20 fl oz sausage pack (MPN 7000145569) needs a bulk gun and cuts reload time on a run of sleeves and joints. The 5 gallon pail (MPN 7000006379) is for trowel or bulk-pump application when you are firestopping a whole floor or large joint runs.
6) Can 3M Fire Barrier Sealant CP 25WB+ be painted over to match the wall?
Yes. It is water-based and paintable, so on exposed walls in occupied space you can finish over it. Note the sealant itself is red, which most inspectors look for as a visual marker that a penetration has been firestopped, so check with your AHJ before painting it out.
7) Will 3M CP 25WB+ sag if I gun it into an overhead floor penetration?
It is sag-resistant, so it holds in both wall and floor applications and gives clean adhesion overhead without slumping out of the sleeve before it skins. Cured hardness is 45 Shore A, firm but still flexible enough for static joint movement.
8) Is CP 25WB+ the right product for a moving expansion joint?
It is tested for static construction joint systems under ASTM E1966 (UL 2079), so it suits head-of-wall and other joints with limited movement plus through-penetrations. A dynamic, high-movement expansion joint is a different application and needs a firestop system listed for that cycling.
9) Is 3M CP 25WB+ firestop sealant made in the USA?
Country of origin is the United States. That is the detail government, education, and healthcare procurement teams usually need on file for domestic-preference purchasing.
How fast can I get the 3M 7000006379 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the 3M 7000006379 come with a warranty?
Absolutely. The 3M 7000006379 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the 3M 7000006379?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the 3M 7000006379 from ZenSupply?
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