3M Fire Block Sealant – Reliable and Fast-Setting Firestop, Orange, 12 oz Aerosol Can

Stop the spread of fire and smoke with the 3M Fire Block Sealant – Reliable and Fast-Setting Firestop, Orange, 12 oz Aerosol Can. Designed for use in commercial, residential, and industrial construction, this intumescent aerosol sealant expands when exposed to heat—sealing gaps around pipes, conduits, cables, and penetrations to help contain flames, smoke, and toxic gases during a fire.

The orange color provides high visibility during application and inspection, ensuring proper coverage and compliance with building codes. Its aerosol format allows for fast, precise, and mess-free application in hard-to-reach areas—ideal for electricians, plumbers, HVAC technicians, and firestopping contractors.

This ready-to-use 12 oz can delivers excellent adhesion to concrete, metal, drywall, wood, and plastic surfaces. It cures quickly to form a flexible, durable seal that maintains integrity through vibration and thermal movement.

Rated for up to 3 hours of fire resistance in tested assemblies, this sealant meets ASTM E814/UL 1479 standards for through-penetration firestops and is suitable for both new builds and retrofit applications.

Key Features:

• Intumescent Formula: Expands under heat to seal openings.
• Orange Aerosol Spray: High visibility for inspections.
• 12 oz Can Size: Ideal for spot repairs and mobile crews.
• Fast Application: No mixing or tools required.
• Flexible & Durable Seal: Resists cracking and movement.
• Code-Compliant Performance: Meets fire safety standards.
• Easy to Use: Perfect for tight spaces and overhead work.

Applications: Firestopping in walls, floors, utility penetrations, and mechanical rooms.

With the 3M Fire Block Sealant, trust a proven, life-saving solution that delivers fire protection, lasting reliability, and peace of mind—every time you seal.