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Sealing the top plate where the liner terminates?

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by Dustin, Oct 4, 2012.

  1. Dustin Feeling the Heat

    joined: Sep 3, 2008
    271 posts
    Western Oregon
    Hey fellas,

    When I cleaned the chimneys lately, I noticed the sealant between the SS top plate and masonry chimney is looking a little weathered and could stand replacing, what's the best stuff to use for this?

    Also, on my second liner there is a type of storm collar between the rigid SS liner and the solid SS plate, it appears that could also use some caulk to keep water out. Thoughts?
    Dustin, Oct 4, 2012
    #1

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  2. budman Minister of Fire

    joined: Nov 13, 2006
    605 posts
    Valley Cottage,NY
    GE silicone window and door.
    budman, Oct 4, 2012
    #2

  3. DAKSY Super Moderator

    joined: Dec 2, 2008
    4,034 posts
    Averill Park, NY, on Burden Lake II...
    We used to use that, but we found on some of the shorter length chimneys, the top plate got so hot at that juncture that the GE Silicone would actually melt & run down the outside of the clay flue tile & onto the bricks. A real Biotch to clean off.
    Hi-temp RTV silicone is a better option...
    DAKSY, Oct 4, 2012
    #3

  4. Woody Stover Minister of Fire

    joined: Dec 25, 2010
    3,474 posts
    Southern IN
    Uh-oh. I loosened the storm collar on my flex last Spring and instead of putting the hi-temp on to re-seal it, like I originally did, I said "Bah, it's not gonna get that hot, I'll just slap some of this acrylic latex on there." It's right on the liner, not just the top plate. Guess I'd better keep an eye on that. Or do you think it's destined fail in short order, and I should just fix it now while it's still warm out?
    Woody Stover, Oct 4, 2012
    #4

  5. DAKSY Super Moderator

    joined: Dec 2, 2008
    4,034 posts
    Averill Park, NY, on Burden Lake II...
    Better to get up there now while you can still feel your fingers!
    DAKSY, Oct 4, 2012
    #5

  6. budman Minister of Fire

    joined: Nov 13, 2006
    605 posts
    Valley Cottage,NY
    Daksy I have a 12x12 flue that the liner go's through and it has been sealed thay way for six years now and all is good.:)
    budman, Oct 4, 2012
    #6

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