Fireblock Insulating Foam Sealant

By Robert Robillard on Energy Saving, Home And Personal Safety

 Firestop Foam Polyurethane Sealant

Firestopping is required in multi-family residential and commercial construction wherever a fire-rated floor or wall separation is encountered.

During the construction process, penetrations are made through framing  in order to accomodate  electrical wires and cables, plumbing pipes, HVAC ducts, and other mechanical items.  These penetrations violate the original integrity of the fire-rated floor/wall system allowing the passage of flame, smoke, and toxic gases to communicate to other areas of the building in the tragic event of a fire.  Many jurisdictions allow the use of firestop insulating foam sealant as an accepted fireblocking material in these situations.

Fireblock Insulating Foam Sealant

Like many carpenters and remodelers I use what is locally available to me.  My lumberyard carries DAP Fireblock Foam Polyurethane Foam Sealant.  This  fireblock insulating foam sealant is an easy way to provide fire protection by reducing air movement through wall, ceiling and other cavities in your home.  Designed to be used to seal the annular space surrounding your vents, pipes, ducts, wires; wall-to-floor or ceiling-to-floor jointspipes, and cables in order to reduce the travel speed of flames, deadly gasses and toxic smoke.

As an added bonus it Fireblock Insulating Foam Sealant also seals air leaks which is a huge component in conserving energy, reduce drafts and saving on heating and cooling costs.  This foam expands to fill, seal and insulate gaps up to 1/2 inch.   Any holes larger and I recommend using mineral wool and then foam or installing blocking or metal flashing.

DAP Fireblock Foam Polyurethane Foam Sealant features:

DAP Fireblock Foam Polyurethane Foam Sealant is designed and accepted for use in Type V residential construction, the foam is bright orange for easy code identification and expands two to three times its size once dispensed from the can.

  • Temp Range 40 to 115 F,
  • Specific Gravity 1.2,
  • Viscosity Foam,
  • Functional Cure 12 to 24 Hours,
  • Tack free in 6 minutes, trims in 30 minutes
  • Insulation Value 4 to 5 per In, Substrates Wood, Metal, Plastic, Drywall, Concrete,
  • Delivers A Draft Stop Barrier
  • Fills, seals and insulates gaps up to ½ inch
  • Impedes spread of fire and smoke through service penetrations
  • Recognized as an Alternate Fireblocking material for residential construction
  • Tested according to ASTM E84, ASTM E814 (modified), UL 1715
  • Bright orange colored foam for easy code identification
  • Seals service penetrations between floors
  • Seals electrical runs through wall studs
  • All-direction dispensing
  • UL Classified


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About the author

Robert Robillard

Carpenter / Remodeler / Editor

Rob Robillard is “The Concord Carpenter” Rob is a builder, general contractor, carpenter, woodworker, and editor of Concord Carpenter and ToolBoxBuzz As a General Contractor and carpenter, Rob owns and operates Concord Carpenter LLC. A full-service remodeling and construction company. Rob is a recognized leader in home building best practices and a source for how-to information for building professionals. On this website, Rob covers all aspects of home construction, building science, home improvement, woodworking, remodeling, and some of the best product and tool reviews. Rob is in charge of our Tool and Product Review series - Concord Carpenter Videos where we post all of our tool reviews and video tutorials. Rob approaches remodeling and building construction with a pragmatic and problem-solving approach. He enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the construction and remodeling industry. He's a strong advocate for "raising the bar" in the construction trades and promoting the trades to youth. #BeAMentor #Green2Great Craftsmanship, quality, and pride guide his journey on this channel The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob

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