3M™ Fire Barrier Electrical Box Inserts

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Protection of membrane penetrations for listed metallic boxes

Tested in accordance with ASTM E814 (UL 1479) (Certified as a Wall Opening Protective Material, UL Category CLIV).

STC rating of 62 when tested in a STC 62 rated wall assembly

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Highlights
  • Protection of membrane penetrations for listed metallic boxes
  • Tested in accordance with ASTM E814 (UL 1479) (Certified as a Wall Opening Protective Material, UL Category CLIV)
  • STC rating of 62 when tested in a STC 62 rated wall assembly
  • Flexible
  • Convenient slits for access to wiring
  • Great for new construction and retro fit applications
  • Full adhesive backing for easy installation

3M™ Fire Barrier Electrical Box Inserts are a flexible, one-piece fire-rated intumescent insert used to protect electrical boxes by adhering to the inside the box. When exposed to fire, the insert expands to fill up the box preventing the spread of fire and limiting temperature rise.

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For industrial/occupational use only. Not for consumer sale or use.

3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.