2 in. x 5 in. x 8 in. SpecSeal® Firestop Block | STI-SBR25

STI's 2 in. x 5 in. x 8 in. SpecSeal® Firestop Block provides a high-performance passive fire protection solution that supports code-compliant wall and floor assemblies. Its pliable composition allows installers to cut, shape, and fit the block around irregular penetrations while maintaining long-term fire resistance. The material remains stable under normal conditions but rapidly intumesces during fire exposure, helping restore compartmentalization and limit flame spread in critical building systems.

• The intumescent material expands when exposed to heat to seal penetration openings
• Designed for use in electrical, mechanical, and cable penetration systems
• The pre-formed shape allows for easy cutting and customized installation
• Provides passive fire protection by limiting smoke and flame spread
• Reusable and does not require curing or special installation tools