3M™ Fire Block Foam FB-Foam

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  • Tested as a Type V residential Fireblock to ASTM E 84 (modified)
  • Durable foam is heat-resistant (up to 240°F/115°C)
  • Acts as a draftstop to help reduce air infiltration
  • Thermal insulator foam offers an R-Value of 4-5/inch (25.4 mm) typical
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For industrial/occupational use only. Not for consumer sale or use.
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  • Tested as a Type V residential Fireblock to ASTM E 84 (modified)
  • Durable foam is heat-resistant (up to 240°F/115°C)
  • Acts as a draftstop to help reduce air infiltration
  • Thermal insulator foam offers an R-Value of 4-5/inch (25.4 mm) typical
  • Fireblock foam is ready-to-use (no mixing required)
  • Tack-free in approximately 5 minutes
  • Expands up to 200% in volume to quickly and effectively seal openings
  • Meets International Building Code (IBC) and International Residential Code (IRC) Fireblocking Requirements
  • Features minimal shrinkage and sag-resistant formulation to help ensure longevity
  • Excellent adhesion that bonds to concrete, brick, metals, wood, plastic and cable jacketing
  • Minimal shrinkage

3M™ Fire Block Foam FB-Foam is a fireblock and draftstop used to help seal, fill, insulate and bond for non-rated residential and commercial construction. This foam-in-place fireblock is heat-resistant (up to 240°F/115°C) and meets ASTM E 84 (mod) Class 1 for smoke spread and flame development. This fireblock foam is ready-to-use and tack-free in approximately 5 minutes.

3M™ Fire Block Foam FB-Foam application insulating wires going through wood framework in wall
Foam expands up to 200% in volume to effectively seal interior voids around wires, cables and pipes
Reliable and Tough Fireblock
We engineered 3M™ Fire Block Foam FB-Foam as a durable fireblock and draftstop. This product seals, fills, insulates and bonds for non-rated residential and commercial construction. Ready-to-use, this fireblock foam is intended to resist the free passage of flame and by-products of combustion within a concealed space of a floor, ceiling or wall cavity — restricting the movement of air, fire and smoke. This foam is tested as a Type V commercial and residential fireblock to ASTM E 84 (modified) and acts as a draftstop to help reduce air infiltration. This ready-to-use product is heat-resistant (up to 240°F/115°C) and expands up to 200% in volume to effectively seal penetrations.

Recommended Applications
3M™ Fire Block Foam FB-Foam is used to seal interior construction voids around:
  • Wires
  • Pipes
  • Cables
  • Penetrations in non-rated wood or steel-framed construction
  • Non-rated framing gaps and voids

3M™ Fire Block Foam FB-Foam application insulating copper pipe going through wood framework in wall
Acts as a draftstop by restricting air infiltration
Seals and Protects
3M™ Fire Block Foam FB-Foam has been evaluated by the UL evaluation report ER9700-01 and complies with the International Building Code (IBC) and International Residential Code (IRC). This is a thermal insulator foam that offers an R-Value of 4-5/inch (25.4 mm) typical. In addition, this fireblock foam is tack-free in approximately 5 minutes and features minimal shrinkage and sag-resistant formulation to help ensure longevity. This foam also provides excellent adhesion that bonds to concrete, brick, metals, wood, plastic and cable jacketing.

Strong Fireblocking Solution
3M™ Fire Block Foam FB-Foam is a tough solution that helps seal, fill, insulate and bond for non-rated residential and commercial construction. Discover the benefits of a fireblock foam that restricts the movement of air, fire and smoke. Enjoy the peace of mind of that comes from a product designed to meet fireblocking codes and requirements.

Learn More about 3M™ Fire Block Foam FB-Foam (PDF, 648.41 Kb)

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.