Question by atom631: crack in fireplace insert. what can i use to repair it?
i have a fireplace insert in my house. i am uncertain of exactly what is it made of, but it definitely isn’t brick (although it looks like brick). I think they are called firebricks, but it is one full sheet and has seams where the sides meet.
i noticed that i developed a crack that runs vertically down the back wall of the insert. it is about 1/4″ to 1/2″ wide and runs for a good 12″-14″ (pretty much the entire length of the insert). when cool, i pressed my fire poker against it, just to see if it flexed or not…and it certainly did.
i went to home depot and i dont think they understood exactly what i have b/c they recommended for me to use one of the following 3:
PL: concrete crack and masonry sealant
Bondo: concrete, brick and stucco repair compound
Pre-mixed concrete patch.
I don’t think any of these are a proper solution b/c none of them say anything about being rated for high-heat. how can i go about repairing this or do i have to replace the entire insert? should i call in a pro or is this a DIY project with the proper material?
Answer by xenon
How wise of you not accepting any of these products, you require “fireclay repair putty ” comes in a sealed can and is applied with a small trowel or broad bladed knife, Allow to dry before lighting a fire.
Depending on where you live it is sold under different names, but they are always the same formulation.
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