Ratings may include incentivized customer reviews.
What Customers Are Saying
The product is generally effective at filling gaps and holes, especially in larger openings, and has fire-retardant properties that allow it to expand significantly. However, some users reported issues with controlling the nozzle, the foam continuing to expand after application, and the product not being approved for certain fire-rated applications. The product can also be messy and difficult to clean up. Overall, the product is useful for many home improvement tasks, but users should exercise caution with the amount used and ensure it is appropriate for their specific application.
Customer review summary generated by AI, including incentivized reviews.Good
Verified Purchaser
Works really good
Would RecommendPasses inspection, expans good
Verified Purchaser
…???!!!!
Would Recommend!!
Verified Purchaser
Use fire block foam insulation around electrical
Would RecommendPerfect for what I needed once I found out it was what I needed 😊
Verified Purchaser
Not limited size
Would Not RecommendI wonder why the product doesn't list its size. tried to compare prices, can't find the size, the photo doesn't clearly show the size of the product. choose something else.
Easy to use
Would RecommendEasy to use, pressure needs to build up when you start to spray
Verified Purchaser
3M FB-Foam 0.039-in H Fire Block Foam
Would RecommendTypical fire foam block - dont get on your hand! hard to wash off
Verified PurchaserVerified Pro
Fire foam
Good product for required fire blocking. Small size makes it easier to apply in tight spaces
Verified Purchaser
Filled in areas in my attic.
Would RecommendIt was easy to apply. The can goes pretty quick.
Verified Purchaser
FIRE BLOCK
Would RecommendThis foam did an excellent job to fill 4 holes that will help with condensation and dust.
Verified Purchaser