Applying Furnace Cement

[mountaineer79]

I've read about some of you guys recommending applying furnace cement to the interior pipe joints to increase the air tightness of the stove. The stuff I bought doesn't have very good directions. So I have some dumb questions: How do you apply it? With a brush? Do you put it on before you put the pipes together or just fill in the gaps after? I tried doing it last night by putting it on before, and I made a hell of a mess. I decided to redo it with new pipes since everything looks like crap now and one of my old pieces of pipe doesn't stay together well anyway.

Thanks.

 

[DiscoInferno]

I'm assuming you have the sticky black stuff (unsanded)? I use a small putty knife, or even my finger, and smear generous amounts around the inside of the female side of the joint. Then insert the crimped side and turn it a bit to increase contact. This should prevent a mess on the outside. While still wet (and maybe even when dry but not yet heat-cured) it washes off with water.

 

[mountaineer79]

What about the collar that connects the pipe to the stove or the thimble into the chimney? Do you put any in either of those locations?

Thanks

 

[DiscoInferno]

Yes to the collar, smear it inside the collar. I assume yes to the thimble also, although I don't have one of those.

Most/all of these connections should be fastened with 3 sheet metal screws as well.

 

[latitude45]

This thread brings up a question I have.. Does anyone know if you can paint over furnace cement? Im fixing up an old VC Resolute and repainting it a dark red. All the seals except the bottom right under the door seem to be fine. I was planning to seal the gap with rutland furnace cement from home depot then run the stove a bit to cure the cement. Then take it to the garage for painting.. Am I missing anything?