3M™ Fire Block Foam FB-Foam is a fireblock and draftstop used to help seal, fill, insulate and bond for non-rated residential and commercial construction. This foam-in-place fireblock is heat-resistant (up to 240 °F/115 °C) and meets ASTM E84 (mod) Class 1 for smoke spread and flame development. This fireblock foam is ready-to-use and tack-free in approximately 5 minutes.

3M™, 7100006734, Fire Block Foam, Ready-To-Use, Aerosol Can Container, 12 fl-oz Container, Composition: Polyol Blend, 4,4' Diphenylmethane diisocyanate (MDI), Dimethyl Ether, Isobutane, Polymethylene Polyphenylene Isocyanate, Propane, Liquid Form, Slight Hydrocarbon Odor/Scent, 240 deg F, 165 g/L VOC, Applicable Materials: Wires, Pipes, Cables, Penetrations in Non-Rated Wood or Steel-Framed Construction, Framing Gaps and Void

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• Thermal insulator - r-value of 4 to 5 per inch typical
• Tack-free in approximately 5 min
• 1 lb/cu-ft core density
• 15 months shelf life
• Inhibits air circulation, draftstop helps reduce air infiltration
• Features minimal shrinkage and sag-resistant formulation to help ensure longevity
• Durable polyurethane foam - heat resistant up to 240 deg f (115 deg c)
• Volume expanding properties - expands up to 200 percent in volume upon dispensing to quickly and effectively seal openings
• Ready to use immediately - fireblock foam is ready-to-use (no mixing required)
• Excellent adhesion that bonds to concrete, brick, metals, wood, plastic and cable jacketing