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stove pipe sealer

Discussion in 'Modern EPA Stoves and Fireplaces' started by logrunner, Oct 16, 2026 at 10:21 AM.

  1. logrunner

    logrunner

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    What do you use to seal sihgle wall stove pipes? Name brand, temp. rating, etc. I need something that will seal but also still let me take it apart to clean the chimney. I have been looking at different sealers but can't decide.
     
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  2. golf66

    golf66

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    Rutland makes a 600-degree black RTV sealant. Easy way to seal the pipes: connect them all together and use blue painter's tape to form a sealing strip over the pipe joint. apply silicone all the way around and remove the tape. Never put silicone on the inside of a pipe connection as it will be quite difficult to pry the pipe apart.
     
  3. brenndatomu

    brenndatomu

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    Why do the pipes need to be sealed? Made poorly, doesn't fit well? Normally there is no sealer used...
     
  4. logrunner

    logrunner

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    Thanks for the replies. I have used this stove, NC30, for a few years now and never sealed the pipes. Last year I smelled smoke in the house, a lot, a few different times. I just cleaned the pipes and never noticed, hope I make this part clear to you, the pipes are all female end over male end going out of the stove towards the chimney. I have a 12 foot chimney pipe and know it should be at least 15 but I have dealt with it. So if I have poor draft on a certain day the smoke going out of the stove could leak around the pipes. Just a guess on my part and I am not an expert.
     
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  5. logrunner

    logrunner

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    I meant to add that only have a handfull of creosote yearly so it's not build up.
     
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  6. brenndatomu

    brenndatomu

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    So its male ends pointing toward the stove? If so then that is correct.
    Do you have a screen on the cap?
    If so then that is often the source of an occasional smoke smell, or smoke rollout during loading...the screen just gets partially plugged off and there ya go...happens during real cold snaps sometimes too...gets iced up.
     
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  7. logrunner

    logrunner

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    Yes but my thinking on the pipes are male towards the chimney the smoke can't leak around the seams as well. No screen on the cap. The smoke smell only happens after dark and only happened a few times. I have to open windows no matter how cold it is outside.
     
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  8. RCBS

    RCBS

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    I've had it seep around a joint where my crimp job wasn't great. I used a dab of red RTV on the offending piece. Only needed a small bit at the seam. Anything that stays soft and has some moderate temperature resistance should be fine.
     
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  9. brenndatomu

    brenndatomu

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    I get it...but the rule is male end down, that way no liquid creosote can leak externally. If the chimney is working properly then smoke won't leak out, as the chimney has a negative pressure, so air can leak in, but smoke should not leak out
     
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  10. logrunner

    logrunner

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    Ok now I understand the piping, thanks for the info. I will purchase some Rutland sealer.
     
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  11. Highbeam

    Highbeam

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    I have an NC30, it's an easy breather, 12 feet should be plenty.

    Do you think that due to your upside down stove pipe situation that you had some creosote leakage onto the outside of the pipe somewhere? That black goo can stink like crazy.

    I would not advise sealing the joints of a gravity operated chimney. Sure, on a pellet stove where the exhaust is actually pressurized by a fan you need a good seal but on a stove chimney things are under a vacuum.

    Do check that the cap is cleared. If someone forced me to seal the joints I would use black high temp silicone (ultra black) from the auto parts store. Same stuff you can use to replace the door gasket. Use masking tape as advised above to keep the exposed bead minimal.
     
  12. logrunner

    logrunner

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    Thanks for the reply. I meant to add that only have a handfull of creosote yearly so it's not build up. I have stainless steel chimney insert and hardly any creosote. The pipes in house have very little on them. I'm smelling smoke not cresote. I'm going to try the sealer and hope that fixes it because I have no idea what else it could be.
     
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