MEECO'S RED DEVIL 121 Fireplace Mortar and Furnace Cement

Roy: Generally fine…but tough to get into small fireplace/tight mortar joints

Canada on Sep 13, 2023

KS: Used this furnace cement to repair holes in the fire box of our propane BBQ.
Used the cement to glue on a piece of sheet metal over the larger holes. Then covered it over with more cement. On small holes, just used cement. Works great, and our Bbq is back in business.

Canada on Jun 24, 2023

Marcel diotte: Pas eu la chance encore d’employer le produit.

Canada on Jun 21, 2023

Phishfinder: Used to reinforce old crumbling refractory cement around woodstove collar where it meets the liner. Easy to use and did the job perfectly.

Canada on Jan 13, 2023

CaliBurito: Was skeptical if this would work and blend in my fireplace. Well it stands out with a massively different color but is holding up exceptionally well. Saved me $700 instead of buying a custom made fire brick

United States on Jul 31, 2022

Neuromancer: The mortar went on smooth like butter! We repaired the crack in my chimney with one coat, and it dried fast. We were worried due to the heat and humidity this time of year, but it did not seem to be an issue. This is a really great product, and a must to have on hand if you have a chimney.

United States on Aug 06, 2021

DanielDaniel: I recently rebuilt my kiln that had a broken/missing piece of brick and another section where the brick was cracked all the across the back of the kiln. The Red Devil mortar saved me from having to buy expensive bricks to replace the rear bricks that had cracked. I was able to mortar them together with no problem. The other area was the top right rear of the kiln where a piece was broken off and missing. Instead of having to figure out how to cut the entire brick I just cut out a section of a new brick and mortared it onto the existing brick. I have used the kiln quite a few times since and it has held up really well, maybe even better than the original bricks.

United States on Dec 10, 2019

Andrew Franch: My 1979 Grey Vermont Castings Resolute woodstove was overfiring (i.e. burning up a loaded stove too quickly and at far too high a heat). Was waking up to a cold stove. Typically overfiring is caused by unwanted ingress of air into the burn chamber. First I tried replacing all the door and window gaskets. Then I inspected the seams. The metal plates of the stove expand and contract and ultimately the caulking between the plates is destroyed. I cleaned out the stove completely and inspected the seams inside and out. Sure enough crumbling cement caulk and light could be seen by shining a very bright light from the inside of the stove directly at certain seams.After struggling to find a grey furnace cement locally I ordered Red Devil 121 on Amazon. The black stuff would have been butt ugly!

I followed instructions and cleaned, then wetted surfaces to promote adhesion. I made sure to have a stockpile of rubber gloves, newsprint for wiping, a good caulk gun, and plastic silverware knife (this flexed and produced a pretty bead). I made sure to cut the tube on the smallest cut line on the nozzle. Consistency was perfect and the product flowed smoothly. I knew from the flow rate a...

United States on Dec 15, 2016

Craig V.: Used this to fill in cracks in my fireplace. Live in a house built in the 30's and the grout between the marble and brick on the fireplace had deteriorated. Our inspector told us to fill these before having a fire. I had to use up the sides as well as at the. It is a little runny but it solidifies quickly. Filled in small gaps as well as a gap about 1 inch. For the inch gap on the top I had to zigzag across then let that dry and then fill the rest in. It is just to runny to hold itself in this size of a gap so it needed some support. It was completely dry by the next day but I didn't check later in the day. We had a fire a few days later and many since then and it has held up strong. The color matches normal brick grout and chars/blackens just like normal grout so it blends in well.

United States on Aug 22, 2016

Terry: great product.

Canada on May 23, 2015