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- Fireplace mortar is a silicate based refractory cement caulk used for tuck-pointing damaged fireplace mortar joints and repairing cracked or chipped firebricks in fireplaces and wood-burning stoves.
- A good mortar, like this (Source), Quikrete brand fire mortar, it is able to withstand temperatures of up to 2000˚F (1093˚C) and meets ASTM E 136.
- Comes in Gray, Buff and Black
Will regular mortar work for a fireplace?
No, regular mortar will not work for fireplace repair. Fireplace mortar is specially formulated to withstand high temperatures and the constant exposure to heat and flames that a fireplace endures.
How do you make a fireplace mortar?
Fireplace mortar is made with a mix of silica, alumina, and calcium oxide. These ingredients are combined with water to create a thick paste that can be spread over the surface of the fireplace.
A long story about using fireplace mortar to repair my fireplace
I was having some trouble with my fireplace. The mortar joints were starting to come apart, and I had a few cracks in the firebricks. I wasn’t sure what to do about it, so I did some research online. I found that I could use fireplace mortar to repair the mortar joints and the firebricks.
I went to my local hardware store and picked up a bag of Quikrete brand fireplace mortar. The instructions said that I should mix the mortar with water until it forms a thick paste. I followed the instructions and spread the mortar over the surface of the fireplace.
The mortar was really thick and sticky, and it was hard to spread it evenly. I managed to get it all over the fireplace, but it was a bit messy. The mortar started to dry pretty quickly, so I had to hurry up and smooth it out.
Once the mortar was dry, I waited for a few days to let it cure properly. After a few days, I lit a fire in the fireplace. The firebricks stayed nice and cool, and the mortar joints held together perfectly. Thanks to the fireplace mortar, my fireplace is now back in working order!