Rectorseal 66531, Biostop 350i, Intumescent Firestop Sealant, 6 - 10.3 oz Tubes with Free Heavy Duty Caulk Gun

Description

🔥 Seal the heat, save your space — fireproof like a pro!

Rectorseal 66531 Biostop 350i is a high-performance intumescent firestop sealant that expands 350% when exposed to heat, providing superior fire protection. This water-based, VOC-compliant formula resists mold growth and withstands freeze-thaw cycles, ensuring long-lasting flexibility and durability. The package includes six 10.3 oz tubes and a heavy-duty caulk gun for professional-grade application.