3M™ Fire Barrier Sealant IC 15WB+ – Yellow, 20 fl oz Sausage Pack

Protect fire-rated penetrations with confidence using 3M™ Fire Barrier Sealant IC 15WB+, a professional-grade intumescent firestop sealant engineered to help prevent the spread of fire, smoke, and toxic gases for up to 3 hours in tested systems. Designed for contractors who demand dependable performance, this one-component, ready-to-use sealant delivers exceptional adhesion and a durable, long-lasting fire barrier.

Its advanced water-based, paintable formula is easy to apply with standard caulking equipment, allowing for clean installation and simple water cleanup. The sag-resistant consistency helps maintain precise application on vertical and overhead surfaces, while its re-enterable and repairable design simplifies future maintenance or system upgrades.

Ideal for sealing penetrations around metallic and plastic pipes, conduit, HVAC ducts, cable trays, bundled cables, busways, blank openings, and static construction joints, this versatile sealant expands when exposed to high temperatures, helping maintain the integrity of fire-rated wall and floor assemblies. It also acts as an acoustic barrier to reduce sound transmission between spaces, making it an excellent choice for commercial, industrial, and residential construction projects.

Key Benefits

• Up to 3-hour fire protection in tested and listed systems
• Intumescent technology expands during fire exposure
• Helps block fire, smoke, toxic gases, and airborne sound
• Strong adhesion to concrete, drywall, metal, wood, plastic, and cable jacketing
• Water-based, paintable, and easy to clean with water
• Sag-resistant for clean, professional application
• Re-enterable and repairable for future modifications
• Suitable for commercial, industrial, and residential firestop applications

Recommended Applications

• HVAC ducts and vents
• Metallic and CPVC pipes
• Electrical conduit
• Power and communication cables
• Cable trays and busways
• Blank openings
• Static construction joints
• Fire-rated walls, floors, and floor-ceiling assemblies

Choose 3M™ Fire Barrier Sealant IC 15WB+ for reliable firestop performance, efficient installation, and long-term protection that helps keep your projects compliant and secure.