Sealing the top plate where the liner terminates?

[Dustin]

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?

 

[budman]

GE silicone window and door.

 

[DAKSY]

GE silicone window and door.

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...

 

[Woody Stover]

GE silicone window and door.

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...

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?

 

[DAKSY]

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?

Better to get up there now while you can still feel your fingers!

 

[budman]

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.