SpecSeal SBR Intumescent Firestop Block is the new penetration product from STI. Designed to seal medium and large openings in fire-rated floors and walls. With it's compressible nature and ability to be installed in a brick like fashion allows it to fill all gaps and voids. During exposure to fire the blocks expand up to 300% to seal the path while still protecting pipes and cable.

• Intumescent – expands in all directions for a tough, tight seal
•Reinstallable for easy retrofitting of various pipes, cables, and innerducts
• Lightweight for ease of installation
• Easier wire screen requirements for large openings and 2 hour ratings
• May be cut to size
• No special tools required
• Superior air leakage ratings
• No cure time -> fast application
• Block may be coated using primer if required
• Dust-free, fiber-free, halogen-free, and solvent-free