Sealing between sections of Cast Iron boiler

[capetom]

Hello All,

I've been reading the forum for a bit but this is a first post.

I purchased an older home with both a coal/wood and an oil boiler. The coal boiler is a 1958 American Standard Severn. It is generally in good shape but the sealing between the sections has crumbled. I was planning to reseal these gaps by chinking in a round gasket then sealing with a layer of furnace cement. Does anyone have experience with how this is normally done?

My plan at this time is to use the boiler occasionally and for a power failure emergency backup. As I have access to both coal and wood, future plans will be either more sophisticated controls (just manual now) to integrate the two boilers or looking at a gasifier/water storage when money allows.

Thanks for any advice on the seam question.

Tom

 

[webbie]

Cast iron wood boilers like SIME, Buderus, etc. are sealed with a liberal application of black furnace cement. Rutland is a good brand.

 

[webbie]

From what I have seen, the black cement sticks to metal better - I think a lot of this stuff is similar in composition (silicates), but since I have actually seen the shiny black stuff used on new boilers at the factory (and have used it to build cast iron stoves myself) - at least I know that works.