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boiler smoking after sealing top box

I recently tore down aa Utica gas fired boiler and sealed top box with silicone will the smoke ever stop or should I seal with something else

Thanks

Comments

  • JStar
    JStar Member Posts: 2,752
    The silicone is probably off-gassing. I would much rather use a fire-rated kaowool blanket or rope for sealing the flue collector. It'll be A LOT easier to service every year as well.
  • SWEI
    SWEI Member Posts: 7,356
    Was this high temp RTV, or some kind of generic home improvement store silicone caulk?

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