3M FB-249 Fire Barrier Pillow,...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$23.09
3M FB-249 Fire Barrier Pillow, Small, 2 in x 4 in x 9 in

3M FB-249 Fire Barrier Pillow, Small, 2 in x 4 in x 9 in

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Model: FB-249

In Stock (leaves warehouse same day if ordered before 3pm ET)

$23.09
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3M FB-249 Fire Barrier Pillow, Small, 2 in x 4 in x 9 in

The 3M FB-249 Fire Barrier Pillow is a small-size firestop pillow measuring 2 in x 4 in x 9 in, designed to seal openings and penetrations where cables, conduit, cable trays, and other building service lines pass through fire-rated walls and floors. Sized for tighter openings and smaller cable bundles, this compact pillow is easy to position by hand and does not require mixing, curing, or special tools to install. Each case ships with 24 pillows, giving contractors and facility teams a ready supply for firestopping projects in office buildings, data centers, and industrial facilities. Backed by the 3M name, the FB-249 pillow is built to support code-driven compartmentalization strategies in commercial and industrial construction.

Key Features

  • Compact Size: Measures 2 in x 4 in x 9 in, making it well suited for small openings, tight cable clusters, and hard-to-reach penetrations.
  • Small Pillow Format: The FB-249 is the small-size option in the 3M Fire Barrier Pillow lineup, ideal for sealing around smaller cable runs and conduit clusters where larger pillows will not fit.
  • Repositionable Design: Fire barrier pillows can be removed and reinstalled around penetrations as cables or conduit are added, removed, or rerouted, simplifying future modifications.
  • Tool-Free Installation: Pillows are hand-placed into openings without mixing, curing, or special installation equipment, helping speed up firestopping work.
  • Case Packaging: Sold 24 pillows per case for efficient ordering and job-site inventory management.
  • 3M Reliability: Manufactured by 3M, a recognized name in passive fire protection products for commercial and industrial construction.

Technical Specifications

  • Model: FB-249
  • Size: Small
  • Dimensions: 2 in x 4 in x 9 in
  • Package Quantity: 24 per case

Typical Applications

  • Firestopping Cable and Conduit Penetrations
  • Sealing Openings in Fire-Rated Walls and Floors
  • Data Center and Telecom Room Penetration Sealing
  • Commercial and Industrial Construction Projects
  • Retrofit and Renovation Penetration Sealing
  • Multi-Tenant and Office Building Firestopping

Why 3M?

3M is a widely recognized manufacturer of passive fire protection products used across commercial, industrial, and institutional construction. The FB-249 Fire Barrier Pillow offers a small, repositionable, tool-free format that supports code-driven compartmentalization strategies at cable and conduit penetrations. With 24 pillows per case, contractors can stock a consistent, dependable firestop solution for ongoing projects and future modifications, backed by the 3M name.

Product Specs

list_batch:
SPB-20260922
Product Type:
Fire Barrier Pillow & Block
Configuration:
Small, 2 in x 4 in x 9 in
Department:
Electrical
Product Subgroup:
Sealants
Product Group:
Jobsite Supplies
Application:
Commercial Construction
Country Of Origin:
United States

3M FB-249 – Frequently Asked Questions

1) What size opening does the 3M FB-249 fire barrier pillow fit?
The FB-249 is the small pillow in 3M's Fire Barrier Pillow line, measuring 2 x 4 x 9 inches. That footprint suits tight openings, small cable clusters, and hard-to-reach penetrations where a larger pillow won't seat. For a wide sleeve or a full cable tray opening you'd be stacking a lot of these, so a larger pillow size is the better choice there.
2) Can firestop pillows be removed and put back when cables are added later?
Yes, and that is the main reason to choose pillows over a cured sealant. The FB-249 pillows are hand-placed and repositionable, so you can pull them, run the new cable or conduit through the opening, and pack them back in. In data centers and telecom rooms where cable counts change constantly, that beats cutting out and re-caulking a sealed penetration.
3) How many 3M FB-249 pillows come in a case?
Each case holds 24 pillows. For planning, that is the ordering unit, so a job with several small cable penetrations is usually one case rather than a count of loose pillows.
4) Do I need any mixing, caulk gun, or special tools to install 3M FB-249 fire barrier pillows?
No. The pillows go in by hand with no mixing, no cure time, and no special equipment. Nothing has to set up before the opening is considered packed, which is why crews use them for retrofit and renovation work in occupied buildings where you cannot wait on a sealant to cure.
5) Should I use firestop pillows or firestop sealant for a cable penetration?
Pick pillows when the penetration will change. The FB-249 pillows pack into openings around cables, conduit, and cable trays by hand and come back out when the cable count changes. A sealant or putty makes more sense on a penetration you expect to leave alone, since it has to be cut out and reapplied to modify. Blank or rarely touched openings are also candidates for a block or sealant instead.
6) What is the 3M part number for the small fire barrier pillow, and where is it made?
The manufacturer part number is FB-249, the 2 x 4 x 9 inch small pillow, and it is made in the United States. Distributors ordering to a spec should call it out as 3M FB-249 to separate it from the larger pillow sizes in the same family.
7) Where do contractors typically use the 3M FB-249 pillow?
Commercial and industrial construction, mainly at cable and conduit penetrations through fire-rated walls and floors: data centers, telecom rooms, multi-tenant and office buildings, and retrofit or renovation work where existing openings need to be packed. The small 2 x 4 x 9 inch format targets the smaller bundles and clusters in those spaces.
How fast can I get the 3M FB-249 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the 3M FB-249 come with a warranty?
Absolutely. The 3M FB-249 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the 3M FB-249?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the 3M FB-249 from ZenSupply?
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