Cracking internal layer of cob oven.

[Tboney]

Hi im looking for some advice my oven had some cracks ,some have been filled and have stayed filled without cracking again but some others have cracked again. I wil post pictures.
what shall i do?

Thanks

[Tboney]

[bentedesco]

I see you have a butane oven in your dome, be careful. those things can get REALLY hot!

[Tboney]

I have been putting it on the lowest flame to dry to help with drying the oven out. Its still sofitsh on the bottom 6 inches i mean if i press my finger in it indents. What about the cracks? Any advice?

[david s]

Fast drying will lead to more cracking, as you’ve already found. Allow it to dry by sun and wind, much safer.
Like I advised earlier you can’t get plastic clay to stick to dry clay. You have to wet the area, fill the crack then leave it to dry.