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
    Commented May 24, 2018 at 11:05
  • 1
    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
    Commented Jan 30, 2019 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
    Commented May 31, 2019 at 23:22

2 Answers 2


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
    Commented May 31, 2019 at 23:24
  • Looking at the input..Sounds like time to buy a new one..
    – user101687
    Commented May 31, 2019 at 23:28

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:


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