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Straw Foam

ItemId: SF-FIREB12

Straw Foam Fireblock


  • ASTM E84 Class 1

  • No dispensing tool required

  • Closed Cell Foam

  • R-4-5 per inch

  • Single Use Only

By the can...

Buy Now - $7.99
$6.89 / can


By the case...

Buy Now - $89.99
$79.99 / case of 12


1040 tax credit

This product qualifies for 10% in energy tax credits.

HANDI-FOAM® polyurethane foam sealants are moisture cured sealants, designed to completely fill and seal small gaps, cracks and voids up to about 3 inches.  This fire block foam has excellent adhesion™and expansion characteristics ensuring a complete and permanent air tight seal.  Straw foam products are designed for use without the need for a separate gun.  This product is dispensed through the included flexible straw.

Handi-Foam® Fireblock has been evaluated per ICC-ES report ESR-1868.  Fireblock is an orange colored foam allowing easy identification by code officials.

Handi-Foam™ is designed utilizing a non-flammable blowing agent to assist in the safety of the end user.  Handi-Foam™ spray foam, sealants and adhesives contain no Formaldehyde, CFC™s or HCFC™s.


  • Size: 12 oz

  • Tack Free: 5 min.

  • Cuttable: 1 hr.

  • Full Cure Time: 12-24 hrs.

  • Type: Polyurethane Gun Foam

  • Fire Rating: Class 1 (ASTM E84)

  • Density: 1.0 lbs/ft³

  • R-Value: 4-5 per inch

  • Closed Cell: Yes, >70%

  • Air Barrier: 0.0025 cfm/ft² @ 75 PA (ASTM E-284)

  • MFTR Part No: P30033

  • Shipping Weight: ~1 lb

Technical Information:

  Operating Instructions:
   Can be found in data sheet or can label.

  Data Sheet


Safety Equipment:

  Safety Googles Gloves Long Sleeves

Installation Tips:

  • Temperature: Fire block sealant products are temperature sensitive.  You can spray this fire block insulation foam in colder outdoor temperatures, the key is to keep the core temperature of the can within the proper range of 65-100°F.

  • Larger Voids: If sealing voids 3" or larger, moisten with a spray bottle before foaming.

  • Safety Considerations: Our Safety Kit includes a tyvek suit with hood, respirator, goggles, and 2 pairs of nitrile gloves.

  • Clean Up: You can clean up uncured foam with Handi-Cleaner.  Clean gun tip after every use.  Clean basket whenever changing cans.  Once foam is fully cured, you will have to remove it by mechanical means.

Optional Accessories:

You may be interested in some of these accessories.

Spray Foam Cleaner
Handi-Cleaner (10 oz)
Spray Foam Safety Kit

Full Safety Kit

Gloves (2 pair)

Looking for two-component spray foam kits?

Note: Use this product only according to the manufacturer's written instructions.

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