RTV Sealant?

As long as the sealant can withstand the temperature specified in the manual you can use it, also you need to use screws for a mechanical bond. Always follow the installation manual use the more restrictive of what is in the vent manufacturers/stove manufacturers/code manuals that way you satisfy everyone.

I used pretty much the same thing, except from Hi temp automotive RTV. If it is good enough to seal the headers for my race car it better be good enough for stove pipe!

high temp rtv(red) will be fine. Also at the connection from the flex liner to the apapter and from the adapter to the tailpiece plenty is better

Mike49024 said:

There isn't any mention of sealant in the owners manual, or what temperatures the exhaust reaches near the stove like that.

And yeah, that was my thoughts too on the if it works on manifolds, turbos and headers - why not on a stove?

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Installation manual should mention it or go at least as far as telling you to follow the vent manufacturers installation procedure.

Mine says to use high temperature silicone sealant and screws or follow what the vent manufacturer says. My vent manufacturer says the use high temperature silicone sealant and screws on the adapter and screws on the venting. My venting has high temperature silicone sealing rings no goop needed except back that the adapter. Your sealant should be fine as the temperature in the venting under normal burning doesn't get much above a few hundred degrees, the thermals on your exhaust blower will cut off the motor at 475 and the stove will then shut down.

Now all bets are off if you manage to trigger a creosote fire in the venting, but at that point the venting itself is likely going to be toast.

The only problem with RTV comes when it is time to take the pipe apart. Thats why we use mill pak. It has a higher temp rating and is much easier to take apart when the time comes. Should be available at any decent Hearth Shop. Actually, the Hearth Shop you bought your stove from should have sold you a tube of this.

The normal silicone sealer thats sold for the application is rated at 500F

The High temp automotive stuff (Red) is rated right up there. The stove stuff is black, no biggy on the color as long as the heat rating is 500F

Using a screw or two on the connection is always a good idea. The silicone will usually hold the thing to the point that removing it will be nearly impossible, but a scew ot two keeps the inspctors happy.

The idea is to prevent things from coming loose if the stove is bumped or jiggled.

I purchased a "quick disconnect flange" and fastened that to the outlet of the blower with silicone and screws then fastened the other end of the unit to the pipe.

This allows the stove to be removed if need be to work on it.

I set my stove far enough out on the hearth so I can crawl all the way around the beast and get to everything without moving the stove.


Good luck

Snowy