3M fire sealant

[n3pro]

Would this be useable for stove pipe joints? I had been using furnace cement but it cracks and flakes off eventually. I stumbled upon this picking up caulking for windows. Sounds good BUT I miss things sometimes.



http://www.shop3m.com/98040054565.h...ugh&WT.mc_id=shop3m-AtoZ-fire-barrier-sealant

 

[begreen]

I don't think so. Latex based, service Temperature Range: -20° to 180°F (-28° to 82°C) and when it gets flue temp hot it can expand 3x.

http://multimedia.3m.com/mws/mediaw...s6E666666--&fn=3M FB CP25WBPLS_PDS_5012-6.pdf

 

[DexterDay]

What type of Pipe is it? Single wall? Double wall?

I put a Clear High Temp RTV (latex), thats rated for 750° and it works great. But my Double wall never reaches surface temps of 750°……… Nowhere near that temp

For Double wall something in the 500°-750° range should work. And the Silicone (not cement) are much more pliable and easy to remove (when needed).

 

[rijim]

Would this be useable for stove pipe joints? I had been using furnace cement but it cracks and flakes off eventually. I stumbled upon this picking up caulking for windows. Sounds good BUT I miss things sometimes.

View attachment 66495

http://www.shop3m.com/98040054565.h...ugh&WT.mc_id=shop3m-AtoZ-fire-barrier-sealant

That product is a fire stop meant to prevent the spread of fire between sections of a building; it is designed to expand when heated to create an effective fire barrier at small penetrations between walls and floors. I don't think you want to use it in your application.

Jim

 

[n3pro]

What type of Pipe is it? Single wall? Double wall?

I put a Clear High Temp RTV (latex), thats rated for 750° and it works great. But my Double wall never reaches surface temps of 750°……… Nowhere near that temp

For Double wall something in the 500°-750° range should work. And the Silicone (not cement) are much more pliable and easy to remove (when needed).

Single wall.

Thanks for the responses.

 

[DexterDay]

Single wall sees much higher temps. Please disregard my recommendations.

Single wall.

Thanks for the responses.