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Has anyone repaired a cracked firebrick with refractory cement?

Discussion in 'Modern EPA Stoves and Fireplaces' started by don2222, Sep 10, 2025 at 5:19 PM.

  1. don2222

    don2222

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    Hello

    I see it can be done but has anyone done this?
    Is any refractory cement or refractory mortar adaquate?
    See info below
     

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    don2222, Sep 10, 2025 at 5:19 PM
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  2. spotted owl

    spotted owl

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    Why not just change out the brick?



    Owl
     
    spotted owl, Sep 10, 2025 at 8:17 PM
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  3. don2222

    don2222

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    I have a brand new one, I wanted to try and fix.
     
    don2222, Sep 10, 2025 at 9:25 PM
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  4. brenndatomu

    brenndatomu

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    Yup, furnace cement works great! I've also repaired cracked baffle boards with it too
     
    brenndatomu, Sep 10, 2025 at 10:15 PM
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  5. Screwloose

    Screwloose

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    Yup it works quite fine. I know it survives industrial kiln furniture.
     
    Screwloose, Sep 10, 2025 at 10:39 PM
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  6. Backwoods Savage

    Backwoods Savage Moderator

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    It works. Firebricks are not expensive too.
     
    Backwoods Savage, Sep 11, 2025 at 7:13 AM
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  7. theburtman

    theburtman

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    I would just get a new brick.
     
    theburtman, Sep 11, 2025 at 7:49 AM
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  8. MAF143

    MAF143

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    $25 for a box of 6 firebrick and a 50 mile drive to get them isn't exactly always in my $ budget or time budget.

    I normally have spares on hand, but I'm not gonna get out the diamond blade on the angle grinder to cut a special sized brick at night or in the middle of a snowstorm. I'm for sure not gonna cut them inside the house... If its a full size one I'll replace it sometimes. But if it's a simple halfway clean break I'll glue them back together. The brick at the front of my stove take a beating. I run hot cuz we have a lot of house to heat.

    My woodstove pretty much runs 24/7 from October till April.

    I've used this stuff to glue firebrick back together many times over the years.


    [​IMG]
     
    MAF143, Sep 11, 2025 at 9:04 AM
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  9. brenndatomu

    brenndatomu

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    brenndatomu, Sep 11, 2025 at 10:26 AM
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  10. lukem

    lukem

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    I don't have a stove anymore, but I didn't worry about cracks unless there was a big gap or the brick was in danger of falling/moving out of place.
     
    lukem, Sep 11, 2025 at 11:04 AM
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  11. wildwest

    wildwest Moderator

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    Stove at old home in Colo had cracked bricks, we didn't bother since they stayed in place fine and no gaps.
     
    wildwest, Sep 11, 2025 at 2:13 PM
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