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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Product Depth (in.)  Product Height (in.)  9.5 
Product Width (in.) 
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 46 reviewers.
Rated 5.0 out of 5.0 by Wear gloves! Try to use all during one session. The cans are a little expensive, but they are great for filling up the required space to prevent fires from spreading. Do NOT get it on your hands/wrist/clothes.. or you will be sorry. Wear those recommended gloves!!! I can attest that Krud Kutter is best to take out on the hands ;) though you will need a scrubby or something to get the job done totally. (I followed that up with Working Man's Hands and the result was awesome - can't say the same for the clothes) I say to use all during one session because you will lose some if you leave it in the can or in the nozzle for the next session and it is pricey. Overall, though, very good! February 12, 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 3.0 out of 5.0 by fireblock Its very messy .Kind of hard to install in small cracks. March 12, 2015
Rated 5.0 out of 5.0 by Worked perfectly. Worked great, no complaints. Covered a substantial area without any problems. February 25, 2015
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 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 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 3.0 out of 5.0 by Works good for its designed usage The product information can be misleading if you are unfamiliar with the Building and Fire Code requirements for this type of material. This product is for RESIDENTIAL COMBUSTIBLE FIREBLOCK usage only. DO NOT use for penetrations of Commercial Fire Stop Systems where the Fire Barrier/Wall must be maintained to its designed rating. Polyurethane foam products ARE combustible even after "drying" into a solid foam and therefore can not be used as part of a required Commercial Fire Stop System. The appropriate Fire Seal or Fire Caulk should be used. Make absolutely sure you are using this product appropriately, DO NOT ASSUME. May 10, 2012
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