Using Stove Cement - How clean does everything need to be?

Using Stove Cement - How clean does everything need to be?

PostBy: UpStateMike On: Tue Dec 02, 2008 1:19 pm

I am going to use some cement to seal a couple of small seams in the cast iron where to pieces join together, and I have a couple of pieces of the firebrick that are in need of a little smoothing out (they are shaped and expensive, but I plan on replacing next season).

I also am going to try an old timers trick I saw posted at another site to seal the cooking stove surface plates as they are a tad warped, allowing a little smoke to puffback when I start the fire or if I back the stove way down and there is not much draw. The idea is to apply a line of cement on the seam that holds the plates in place, sprinkle a little ash on the wet cement (to keep the plates from being glued on, and then put the plates on and let dry.

two questions:

1) How clean does the metal / stove brick need to be?

2) For the cast oron seam sealing, is the cement used on the INSIDE of the stove in the firebox, or should I seal from the outside? It seems it would be more aesthetically pleasing to seal from the inside.

Thoughts?
UpStateMike
 
Stove/Furnace Make: Elmira Oval (in house)
Stove/Furnace Model: Round Oak d-18 (workshop)

Re: Using Stove Cement - How clean does everything need to be?

PostBy: rockwood On: Tue Dec 02, 2008 2:19 pm

I have a "warm morning" type stove that I took apart and resealed. I used furnace cement in a tube (with caulking gun) and ran a bead in the groves then set the pieces in place wiping away the excess cement. I used a brush to clean the cast iron the best I could and it worked out well. If you're able to clean the gaps out and If you can get at the gaps from the inside of the stove to put the cement in it should work.
I've never tried it on firebrick so I don't know how that will work.
rockwood
 
Hot Air Coal Stoker Furnace: Stokermatic coal furnace
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Re: Using Stove Cement - How clean does everything need to be?

PostBy: VigIIPeaBurner On: Tue Dec 02, 2008 5:40 pm

I've used a tub of furnace cement for fire brick installation. A trick I learned while working with masons in the summer heat was to soak the brick before motaring in place. It allows the mortar, or in this case the furnace cement, to adhere to the surfaces better. I soaked the fire brick in water before trawling on the cement. I also sponged off the mating surface of the stove making sure it stayed moist after it was free of ash. Use a little cement between the brick seams, creating a sandwich with the cement between the bricks. Be sure to smooth off any that might ooze out, you don't need much.

Now, after all that, I read your post again! You can use the cement to smooth out the brick. Use a sponge to wet them good before applying the furnace cement. Let it dry per directions before firring up. A small pointing trawl will do the trick. I kept an oil burner refractory patched with this technique for many years.
Last edited by VigIIPeaBurner on Tue Dec 02, 2008 8:48 pm, edited 1 time in total.
VigIIPeaBurner
 
Hot Air Coal Stoker Furnace: Keystoker Koker
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Re: Using Stove Cement - How clean does everything need to be?

PostBy: UpStateMike On: Tue Dec 02, 2008 6:39 pm

excellent advice guys. Much appreciated!
UpStateMike
 
Stove/Furnace Make: Elmira Oval (in house)
Stove/Furnace Model: Round Oak d-18 (workshop)

Re: Using Stove Cement - How clean does everything need to be?

PostBy: Freddy On: Tue Dec 02, 2008 9:07 pm

I'm not sure how it would work here, but in other circumstances when I want to use goop to fill a gap & only want it to stick to one surface I'll use Sarahn wrap on the side I want free. Nothing seems to stick to Sarahn wrap. Goop it up, let it dry, then seperate & remove the wrap. It makes a custom very close fit. In your case if the wrap doesn't peel off....it'll come off first hot fire! :)
Freddy
 
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