Any recommendation on fireplace cement?

[700renegade]

I bought a couple year old Buderus wood boiler and while digging into it, discovered all the existing seal material between the cast iron sections is loose. I went over it with a shop brush and easily brushed out 85% of the cement with little effort.

Can this be resealed with common fireplace cement and if so, what brand or kind should I be looking for?

Any tips to getting this re-sealed properly? I can access the joints easy from the outside. ( Inside would be a bit tough unless the material could be dispensed with a caulk gun or something. Inside top is almost impossible to do much with based on it's design. )

 

[Gooserider]

No data on the boilers, but I would expect that Rutland boiler cement, or equivalent would do the job quite nicely. However I would suspect that just smearing cement on the joints, especially from the outside would not give the best results. Would it be possible to take the boiler apart? If so, I would treat it as described in some of the past threads on rebuilding Vermont Castings wood stoves, i.e. take it apart, clean all the joint surfaces with a wire wheel, and glue it back together with fresh cement filling all the seams, and replacing hardware as appropriate...

It might also be worth checking the Buderus site and / or tech support dept. to see if you can get any manuals or service info.

Gooserider