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3M™ Fire Barrier Block B258

  • Product code: B258
  • Manufacturer: 3M
  • Package size:
  • Shelf Life:
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Our 3M™ Fire Barrier Block B258 is a pre-formed foam block designed for easy installation to effectively seal larger openings against smoke, toxic gas and flame. It is simple to use and helps reduce sound transmission.

Key Features 

  • Pre-formed foam block maintains tight firestop seal to prevent fire, smoke and toxic gas transmission
  • Fits medium to large openings in wall and floor through-penetrations
  • No cure time means faster completion
  • Block is paintable with primer
  • Installation requires no special tools
  • Can be repaired and reused as needed, saving time and labor
  • Firestop tested in accordance with ASTM E 814/UL 1479
  • Can be sealed with 3M™ Fire Barrier Rated Foam FIP 1-Step and other 3M™ fire barrier sealants (sold separately)

Applications 

  • Blank openings
  • Metal pipes
  • Cables
  • Cable trays
  • Insulated pipes, combination penetrations

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