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Most Recognized Brand in FirestoppingWater Based and Intumescent (Expands when Heated)U.L. Listed and Meets Building CodesTested Systems Up to 4 HoursCRL 3M CP25WB+ Fire Barrier Caulk is a water based, premium, intumescent, latex-based sealant offering outstanding fire performance plus a non-halogen formula. In addition, the unique intumescent property (expanding when heated) means that as cable and pipe insulation is consumed by fire, 3M Fire Barrier Caulk expands to fill and hold the penetration closed. As little as 1/2 inch (13 millimeter) can effectively firestop the opening. Bonds to concrete, metals, wood and cable jacketing. No mixing required. Dries tack-free in approximately ten to 15 minutes and is paintable after a 72 hour cure. Only minimal amounts necessary to fill the voidAPPLICABLE CODES: Approved for use by all three model building codes (Basic/National Building Code-BOCA, Uniform Building Code-ICBO, Standard Building Code-SSBCCI), as reported in the National Research Board Report No. NER-243.
APPLICABLE STANDARDS: ASTM E-119 Fire Tests of Building Construction and Materials; ASTM E-814 Fire Tests of Through-Penetration Fire Stops; U.L. 1479 Firestops, Fire Tests of Through Penetration. Both tested and classified by Underwriters Laboratories.
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