ancient sealer

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Post by gael » Wed. Jan. 18, 2023 2:40 am

hello everyone, I'm trying to seal my stove with fircement but it seems not holding... always cracking little bit here and there.

so i would like to know how were sealed coal stove un 1940? what they used for it!?

and I'm wondering if it would be a good idea to put stove gasket on thèse, recovered with refractory cement and then firecement ?
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Coal Size/Type: nut/pea/anthra

Post by davidmcbeth3 » Wed. Jan. 18, 2023 3:24 am

You have: (adhesive = sealant)

metal / adhesive / metal

Is the failure in the metal/adhesive interface or adhesive/metal interface ?
If so, it could be surface preparation issues...metal might be oxidized, causing failure .. contact adhesive manufacturer for assistance or treat metal with acid to clean. If still this failure is noted, a different adhesive is required. If contacting the adhesive manufacturer ask them the dyne level (surface tension) needed for the metal surface and their recommended surface prep and adhesive curing methods that maybe used with the adhesive. And when you call, know the metal type(s) you are trying to adhere to...different surfaces may require different treatments.

If failure is inside the adhesive layer itself this indicates a different adhesive is needed as the adhesive does not have good adhesion to itself under the conditions of use.

The adhesive your using might be appropriate for the job. It might not be.

Others may chime in.

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Post by gael » Wed. Jan. 18, 2023 6:07 am

well my stove is cast iron, and cracks are mostly in this part, in inside and outside, and on the adhesive layer itself, but I'm wondering if this Is Not because of the mechanic force between both plates because as you Can see on the first picture, the right plate Is going out whenever the other one at the opposite..
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