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๐ฅ Seal the gap, stop the spread โ safety that sticks around!
3M FB-Foam Fire Block Sealant is a high-performance, quick-curing aerosol foam designed to seal wall, floor, and ceiling penetrations against fire, smoke, drafts, and pests. Tested to meet International Building Code standards and ASTM E 84, it offers excellent adhesion to multiple surfaces, minimal shrinkage, and heat resistance up to 240ยฐF. With an insulating R-value of 4-5 per inch and rapid 5-minute curing, it delivers durable, reliable fire blocking and energy efficiency for residential and commercial applications.

| ASIN | B008KNP928 |
| Best Sellers Rank | #70,063 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #306 in Hardware Sealers |
| Brand | 3M |
| Brand Name | 3M |
| Country of Publication | USA |
| Customer Reviews | 4.4 out of 5 stars 469 Reviews |
| Global Trade Identification Number | 00051115549076 |
| Item Weight | 14.4 Ounces |
| Manufacturer | 3M |
| Manufacturer Part Number | 00051115549076 |
| Material | Foam |
| Material Type | Foam |
| Model Number | 98040056149 |
| Number of Packs | 1 |
| Recommended Uses For Product | Fire blocking and sealing penetrations in walls, floors, and ceilings to prevent the spread of fire and smoke Recommended Uses For Product Fire blocking and sealing penetrations in walls, floors, and ceilings to prevent the spread of fire and smoke See more |
| UPC | 051115549076 |
R**1
Fire resistant peace of mind.
I have a wood stove in my shop. I use this where the chimney goes through the side wall. I spray it heavy to ensure no sparks escape. Easy to use and lasts longer than the sheet metal chimney pipes. Peace of mind when I have the stove fired up for long periods.
T**M
Worked perfectly for what I needed it for.
I used this for the area that my copper pipes came through the floor near my washer. There was also a draft coming in from there. No longer os there a draft, or ants coming in as I have a dirt basement being in an older home in northeast pa, this is ant season here in the spring. They will still find a way up I'm sure. It just won't be there lol. Great product. Easy to clean when still wet. So if you make a mess or put it somewhere you didn't want it, simply wipe it up quick and it will all come up easily.
J**K
Foam works but not fire proof
Product worked but label did say fire retardant. Fills cracks though
C**R
3m
This stuff is Worth every penny No doubt
A**N
Great product
Caulking in kitchen it doesn't expand like regular foam due to fire prevention properties but works great seals areas that u would like to fire stop keeps a 2 hr barrier as per building code if applied rite
Trustpilot
3 weeks ago
3 weeks ago