OSI Flame Stopper 5000 Sealant 10 oz.

OSI Flame Stopper 5000 is a premium red acrylic-latex firestop sealant engineered to maintain the integrity of 1* and 2-hour rated fire-resistive wall and floor assemblies. This 10 oz cartridge delivers a durable, flexible bead that swells under high temperatures to block heat, smoke and flame from migrating through through-penetration openings. Ideal for sealing around pipes, conduits, cables and other penetrants in concrete, gypsum and CMU walls, Flame Stopper 5000 installs easily, tooling to a smooth finish and accepts most paints and coatings.

Designed for demanding commercial and industrial jobs, OSI Flame Stopper 5000 combines proven fire-blocking performance with the workability of a premium acrylic sealant. Its water-resistant formulation resists cracking, chalking and weathering—inside or out—while providing a long-lasting seal you can trust.

Key Features

• Intumescent firestop for up to 2-hour rated assemblies
• Red acrylic-latex formula for easy tooling and paintability
• Compatible with wood, metal, plastic, concrete and masonry
• Water-resistant, flexible seal resists cracking and chalking
• Applies with standard caulking guns; smoothes to a neat finish

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