Dow Great Stuff Pro Gaps / Cracks Fire-Rated GUN Type 24-Oz, 12 cans - Dow Great Stuff Pro, Gaps & Crack Insulating Foam Sealant with GUN-TYPE Can Dispenser (gun not included). ASTM E-84 Fire Rated. 24-ounce Cans. 12 Cans/Case. Price/Case. (aka# 341557, 298141, GSGC24; UPS ground shipment only)
Dow Great Stuff Pro Gaps / Cracks Fire-Rated GUN Type 24-Oz, 12 cans
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Dow Great Stuff Pro, Gaps & Crack Insulating Foam Sealant with GUN-TYPE Can Dispenser (gun not included). ASTM E-84 Fire Rated. 24-ounce Cans. 12 Cans/Case. Price/Case. (aka# 341557, 298141, GSGC24) Sorry, this item will not be available until late May 2021.


  • UPS ground shipment only.


An aerosol dispensed fireblock grade polyurethane foam for filling gaps and cracks. Orange Tinted. DOW 24oz GREAT STUFF Pro Gaps & Cracks Foam (Gun) 341557 Great Stuff Pro 24oz. Gaps & Cracks Professional Applicator Foam Minimal expanding, single-component polyurethane foam sealant. Type V residential fireblock penetration sealant evaluated in ICC-ES Legacy Report No. NER-645. Fills, seals, and insulates gaps up to 3 inches. Dispenses with foam applicator tool (not included, model No. 230409, Great Stuff applicator tool, (sold separately) for precise control. Energy savings eliminates unwanted airflow in winter and summer. Moisture-resistant skin prevents water penetration forming a durable, airtight, and waterproof bond. Quick cure time in less than 1 hour, tack-free in 6 minutes, and trims in 30 minutes. Foam sealant bonds to most building materials and can be painted or sanded. 1 can equals approximately 16 quart tubes of caulk. Linear yield at 3/8 inch bead is 970 feet. UL classified. Identifiable orange color. 24 oz. can.


  • Case of twelve 24 oz. aerosol cans (fits gun type dispensers).


  • 24 oz. can yields about 970 lineal feet at 3/8 inch bead size.


  • FIRE-RATED: GREAT STUFF PRO has been evaluated by ASTM E 814* in wood frame pipe penetrations. Conforms to the ASTM C557-93, D6464, CA25-4, and is UL Class 1 (Flame spread of 15, smoke of 20).
  • Fills, seals and insulates gaps up to three inches.
  • The most economical, convenient and effective method for installing Building Code compliant
  • Fireblocking in wood frame residential construction.
  • Fireblock is used to seal concealed penetrations from floor to floor or room to room.
  • Forms a fireblock and a durable, airtight and water-resistant bond.
  • Not rated for use as a Firestop in commercial fire rated walls.
  • GREAT STUFF PRO is closed-cell foam. It forms a water-resistant outer skin when cured.
  • Bonds to wood, drywall, metal, masonry, glass and most plastics.
  • Tack free in six minutes. Trims in 30 minutes.
  • Wide temperature operating range (25°F to 120°F). Most foams only work in 60°F to 90°F. Freeze/thaw stable.
  • Foam elasticity allows for movement/shifting within a structure from winter to summer.
  • Paintable, stainable and sandable.
  • Can be used to replace acoustical sealants on interior walls. Acoustical Rating: Sound Transmission Class rating of 69.
  • Mechanical spring valve of GREAT STUFF Pro foam is superior to rubber valve. Will not glue shut after use. Use 1/4 of the can today, 1/4 in 30 days, and that can will be good for another 30 days.
  • Choose from three foam applicator gun models. Extended length gun barrel available for easier application, such as sub-floor construction.
  • Orange colored foam allows easy identification by building code inspectors.


  • GREAT STUFF Pro is approved as a residential fireblock sealing material (see ICC-ES legacy report NER-645).
  • Replaces E136 Caulks, Mineral Wools and Solid Materials.
  • UL Classified R-13919 (Flame Spread 25, Smoke Developed 50)
  • Also meets ASTM E-84 Class 1 specs.

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