Customer Reviews for 3M 10.1 fl. oz. Gray Fire Block Specialty Sealant

Worked well on our fireplace. Easy to use.

Didn’t use it and returned to store but order furnace cement & fireplace mortar

I used this to seal berween the tile and my woodburning stove. After two or three fires the caulk turned nearly white and crumbled leaving large gaps.

junk, would never buy this again.

Fast easy and did the trick.

Really impressed. I know of Fire foam and was skeptical to buy this but this seem better because you an reuse it after opening and reseal with a screw or nail whereas, after opening the fire foam, you have to use it all up cannot save it. it get clogged.

Nice color and viscosity. Not sure about teist.

Very good for filling in cracks between the stones in my fireplace.

Rating provided by a verified purchaser

Flowed well. Good price.

Rating provided by a verified purchaser

Easy to use with caulking gun

It washed off in a rain storm 3 days after installation

Rating provided by a verified purchaser

Rating provided by a verified purchaser

The crack around the fireplace was up to 1 inch in places and 1/2 in others, where it joined the wooden floor. I used this product to fill the gap. It seems to have worked. The tube ran out before the job was complete, I bought a second tube but have not finished the job yet!

Rating provided by a verified purchaser

Used to hold retaining wall blocks for fire pit. They are holding up great

Easy application. I was sealing around a gas fireplace. After a couple of uses, it is now crumbling and falling out

Works great. Don't leave a feather edge as it will separate when heated and become sharp

Use this to seal around a wood stove pipe as it goes into the chimney. Does a great job of sealing, and no problem with high heat areas. Highly recommend.

Goes down smooth, easy to manipulate, and sealed in no time. Great product, my go-to!

It was typically easy to apply and did the job. Next question is how long will it last.

My caulk was Grey. Fairly easy to apply and tool. Has a chalking texture than latex caulk I guess because it is specifically for fire sealant. Fells like a quality product.

Use this to replace the old cracked chaulk along the outside edges of the fireplace chimney worked fine excellent sealing.