Hilti 2030020 Firestop Block CFS-BL Firestop Fire Protection Systems

Hilti Firestop Block Approximately 8x 51/4For firestopping electrical boxes in fire resistive walls. These blocks can be used for commercial and residential applications. They are comprised of moldable firestop putty and are designed to help protect electrical outlet and switch boxes from the passage of flames toxic gases smoke and temperature.