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I was trying to repair a cracked chiminea ( outdoor fireplace). I have "Quikkrete" quick-setting cement. I was wondering if this would be okay to use to patch and seal the cracks and hold against high temperatures when I have fires. Could someone please offer any advice on what type of pottery/clay sealing bondage product that is fire resistant, if I should not use this stuff and what maybe I should be using?? I'm not that knowledgeable with this kind of DIY home fix.

  • A picture may help. FWIW, I’ve broken 2 chimeneas in the past, neither was repairable for fire purposes, one got glued and is now a planter the other one went to the dump. – Tyson May 24 '18 at 11:05
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    Fire clay may be your best bet. It is designed for high heat and you may be able to make a patch that will hold. – Ed Beal Jan 30 at 20:09
  • is fire clay ok for outdoors. Where temp change matters? More worried about outside in cold areas were frost may happen ? – user101687 May 31 at 23:22
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No, Portland cement products do not tolerate much heat. Hardware type stores should have some products for use on flue pipes .

  • I do think your wright ..But he has cement. – user101687 May 31 at 23:24
  • Looking at the input..Sounds like time to buy a new one.. – user101687 May 31 at 23:28
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Of course mortar is heat resistant.

All the properties, cement, lime, sand, etc, are naturally heat resistant. However, mixing and applying the mortar can be enhanced by following a few extra steps. See link:

https://www.hunker.com/13401202/how-to-make-fireproof-mortar

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