GREAT STUFF Fireblock Insulating Foam Sealant 16 oz.-345372 - The Home Depot


Model # 345372

Internet # 202023037

Store SKU # 574958

Fireblock Insulating Foam Sealant 16 oz.

GREAT STUFF Fireblock Insulating Foam Sealant 16 oz.

This item has been discontinued.
The Home Depot no longer carries this specific product.

$6.98 / each
  • Helps impede the spreading of fire and smoke; seals gaps & cracks
  • Save money and time by using this fire code approved formula
  • Air-sealing and insulating saves up to 20% on home energy costs


Model # 345372

Internet # 202023037

Store SKU # 574958

GREAT STUFF Fireblock Insulating Foam Sealant can save much more than energy costs. By sealing the pipe, cable and duct penetrations, you minimize airflow. During a fire, that means flames, harmful gasses and toxic smoke cannot spread as quickly. And in an emergency, that could make all the difference. The fact that it helps you conserve energy, reduce drafts and save on heating and cooling costs is great too. How to videos can be found at

  • 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
  • Seals service penetrations between floors & electrical runs through wall studs
  • Airtight, water-resistant and has exceptional adhesion to building materials
  • Tack free in 6 minutes; Trims in 30 minutes; cures rigid in 8 hours
  • Bright orange colored foam for easy code identification
  • All-direction dispensing
  • Seal and Save:

    great stuff insulating foam

  • Air Seal Checklist

Info & Guides

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Assembled Depth (in.)  3 in  Assembled Height (in.)  9.5 in 
Assembled Width (in.)  3 in 
Hazardous Code  2.1  Insulation Type  Spray Foam 
Paintable / Stainable  Paintable/Stainable  Product Weight (oz.)  16 oz 
R Value  Returnable  90-Day 
Two Part  No 
Warranty / Certifications
ENERGY STAR Certified  Yes  Fire Block Rated  Yes 
Warranty Information  NA 


Rated 4.0 out of 5 by 43 reviewers.
Rated 4.0 out of 5.0 by Great Idea Good invention, but needs refinement. Is very messy to use, (wear gloves)and hard to control output. My greatest dissatisfaction is wastefulness. a lot of overshoot, but also can not save material in can for another application , nozzle and spout plug up. Need to invent a can that can be reused another day . January 13, 2015
Rated 2.0 out of 5.0 by Works like the other spray foams I'm not exactly sure what the advantage is for buying this over normal spray foam. According to the lable there isnt any difference in fire proof or retardency - they are all flamable. Had I paid more attention, I would have purchased the normal spray foam for a little less money. December 10, 2014
Rated 1.0 out of 5.0 by Messy & wasteful I used Pestblock to stop honeybees from getting between the siding and wall of house. The screw-on applicator quickly became clogged and the sticky foam came out in gobs that would not stay in place. Luckily I think there is enough in the one spot where the bees were entering that it might accomplish the job, but I am greatly unhappy with the product. The applicator straw, after having to use a coat hanger wire to clear the clogs, broke and the canister is more than 1/2 full of liquid, so you probably should make it in smaller containers and state on the label it is a one-use item. What a messy, wasteful product!!!!!! September 1, 2013
Rated 4.0 out of 5.0 by this product is great Genaral question about all the Great Stuff Products can any of the products can be used around the ducking for exaust leading ouside from an eletric dryer? reason i ask is becouse i have a coold draft coming in. Thanks January 18, 2014
Rated 2.0 out of 5.0 by "One time use" not mentioned on packaging I had a very small job (blocking cracks and holes to deter mice) and bought a 12 oz can. It worked pretty much as-advertised ... EXCEPT: There is no way to clean the nozzle, and according to DOW on this website, DOW does not offer replacements for the "straw applicator". I'm sorry, but that's just plain deceptive. The can and packaging should have a PROMINENT "One Time Use" label. I have more cracks to fill -- I'll be looking for something else. October 16, 2013
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