3M Fire Barrier Block B258

3M Fire Barrier Block B258 РFirestop Solutions for Electrical and Construction Applications The 3M Fire Barrier Block B258 is an intumescent firestop foam product designed for use in firestopping through-penetration openings in walls and floors. It is manufactured by 3M and intended for use by electrical distributors, lighting solutions providers, wire and cable installers, and switchgear suppliers to maintain fire resistance in penetrations involving cables, pipes, and other building services. The product comes in maroon-colored polyurethane foam blocks that expand when exposed to heat to seal openings and prevent the passage of fire and smoke. Specifications Product Name: 3M Fire Barrier Block B258 Manufacturer: 3M Manufacturer Part Number: B258 Physical Form: Solid foam block Color: Maroon Material Composition: Polyurethane Foam (80-95% by weight), Graphite (5-20% by weight) Product Weight: 14.78 lbs VOC Content: 0 g/l (Less H2O & Exempt Solvents) Flammability Classification: Not classified as flammable solid Solubility in Water: Nil Hazard Classification: Exempt from OSHA Hazard Communication Standard UPC: 076308979393 Features Intumescent foam expands under fire conditions to seal openings effectively Designed to fit through-penetration openings in walls and floors with 5 in. (130 mm) dimension projecting through opening Blocks/planks can be resized in the field while maintaining firestop integrity Compatible with 3M Fire Barrier Rated Foam FIP 1-Step for filling voids and interstices Non-reactive and stable under normal use conditions Exempt from hazardous chemical release under normal use Easy to install and remove for maintenance or reconfiguration Downloads & Links 3M™ Fire Barrier Block, Plugs, Plank Installation and Fire Test  (MP4, 355.4MB) 3M™ Fire Barrier Maroon Block, Plug and Plank  (PDF) 3M Fire Protection Products Specifiers Guide  (PDF, 106.3MB) 3M™ Fire Barrier Blocks Plugs Planks Installation Guide  (PDF, 252.1KB) 3M™ Fire Barrier Blocks Plugs Planks Technical Data Sheet  (PDF, 77.5KB) 3M™ Fire Barrier Blocks Plugs Planks Flyer  (PDF, 2.3MB)