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3M CP 25WB+ Water Based Fire Barrier Caulk 2 gal

Brand: 3M Mfg#: CP25WB2G
Product#: 479CP25WB2G
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3M™ Fire Barrier Sealant CP 25WB+ is a high-perfor-mance, ready-to-use, gun-grade, latex-based, intumescent sealant that dries to form a monolithic fire-stop seal that also acts as a barrier to airborne sound transmission.3M™ Fire Barrier Sealant CP25WB+ helps control the spread of fire, smoke and noxious gasses before, during and after exposure to a fire when installed in accordance with a listed through penetration or fire-resistive joint assembly system. 3M™ Fire Barrier Sealant CP25WB+ firestops blank openings and penetrations passing through fire-rated floor, floor/ceiling or wall assemblies and other fire-rated interior building construction. 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 as penetrants are exposed to fire. 3M™ Fire Barrier Sealant CP 25WB+ exhibits excellent adhesion to a full range of construction substrates and p


  • Halogen free
  • Helps minimize sound transfer
  • Paintable
  • Water clean up
  • Extensive listed systems
  • Applied with conventional caulking equipment
  • Fire resistance tested for static construction joint systems in accordance with ASTM E 1966 (UL 2079)
  • Firestop tested up to 4 hr in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115
  • Sag resistant
  • Re-enterable/repairable


  • Brand: 3M
  • Product Line: CP 25WB+
  • Hardness: 45
  • Physical Form: Paste
  • Type: Latex, High Performance, Intumescent
  • Standards: ASTM E814 (UL 1479)/E1966 (UL 2079), RoHS Compliant
  • VOC: Lesser than 1 g/l
  • Specific Gravity: 1.35
  • Color: Red
  • Container Type: Pail
  • Temperature Range: 4 - 50 deg
  • Cure Time: 4 hr