3MFire Block Foam FB-Foam, Orange Color, Ready-To-Use, In-Place, 12 fl oz Can

If you're new to using this product, mask the area, wear gloves and eye protection, and don't be in a rush except to clean up any product that got where it shouldn't.

TURN OFF pilot light before any usage to seal fireplace or water heater.I forgot this and vapors from front of fireplace ignited by pilot light at back of fireplace. I got fire out without calling 911.

Expensive but expands well

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.

The prior owner built an unpermitted addition. The inspector said all the electrical and plumbing pass throughs the headers had to be sealed with fire block foam. Once the drywall was cut away, this made the project quick and easy. Inspector signed off on it with no issue.

Works as intended!

This stuff grows astronomically large. Be sure you know that ahead of time, use fire caulk if no expansion needed

Works perfectly where it’s intended. I wish it was little cheaper or can was bigger.