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3M™ Fire Barrier Electrical Box Inserts EBI-4R, 3.25 in x 3.25 in x 3/16 in, (3/Pack) 18/Case

3M™

$15.75 / Each

SKU 7100412533
Legacy SKU 98044111270
UPC 00068060016676
Product Number EBI 4R

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.

  • 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
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On it's way to you September 18    

Qty

Minimum Order 6 Items
Order Increment 6 Items
  Multiple Application Use
  Efficient Barriers
  Fast Shipping
  Industry Low Price
Product Dimensions
 Imperial Metric
Weight 0.29101 lbs
Width 5.98425 in
Length 5.98425 in
Height 0.66929 in
Shipping Dimensions
Weight 2.1 lb
Length 6.6248 in
Width 4.56299 in
Height 6.8748 in
Color Red

PRODUCT FAQ

  1. What size are the 3M Fire Barrier Electrical Box Inserts EBI-4R?

    The EBI-4R inserts measure 3.25 inches by 3.25 inches with a thickness of 3/16 inch, making them ideal for standard electrical boxes.

  2. How many inserts come in each package?

    Each package contains 3 inserts, and you get 18 packages per case, for a total of 54 inserts per case.

  3. What is the main purpose of these fire barrier inserts?

    These inserts are designed to prevent the spread of flames and smoke through electrical box openings, helping to maintain the fire-resistance rating of your wall assemblies.

  4. Are these inserts easy to install?

    Yes, they're very simple to install—just fit them into your electrical boxes. No special tools or complicated procedures are required.

  5. Will these inserts work with my existing electrical boxes?

    The EBI-4R is designed for standard 3.25 by 3.25 inch electrical boxes, which is the most common size used in residential and commercial construction, so they should work great for you.

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.
```html 3M Fire Barrier Electrical Box Insert (EBI)

The 3M Fire Barrier Electrical Box Insert represents a specialized fire-safety solution engineered to mitigate fire propagation through wall assemblies that have been penetrated by electrical boxes. This product is specifically designed for integration into both one-hour and two-hour fire-rated gypsum wall systems, where electrical penetrations would otherwise create potential pathways for flames and smoke to breach the fire-resistant integrity of the wall assembly.

How It Works

The insert operates through a thermally-activated expansion mechanism that engages when exposed to elevated temperatures during a fire event. As heat is applied, the material undergoes a controlled expansion process that effectively seals the internal airspace within the electrical box, eliminating gaps that could allow flames, smoke, or hot gases to pass through. Additionally, the insert develops a protective char layer on its surface, which serves as a thermal barrier that actively resists further fire advancement and helps maintain the structural integrity of the wall system during critical early stages of a fire incident.

Applications
  • One-hour rated gypsum wall assemblies with metallic electrical box penetrations
  • Two-hour rated gypsum wall assemblies with metallic electrical box penetrations
  • Fire-rated wall systems requiring electrical outlet or switch box installation
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