3M™ Fire Barrier Sealant CP 25WB+

Our most popular intumescent firestop sealant with over 600 tested and listed systems.

  • Up to 4-hour fire ratings per ASTM E 814 (UL 1479)
  • Superior adhesion — bonds to concrete, metals, wood, plastic and cable jacketing
  • Extensive library of UL Classified fire protection systems
  • Intumescent — expands when heated to seal around items exposed to fire
  • Low VOC*
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