Repairs to a clay chimnea? Hi everyone, I have a clay chimnea which when i used last developed...

Hi everyone,

I have a clay chimnea which when i used last developed some ample cracks - I probably got it going too quickly, so my blemish

I was wondering what would be best to repair it with - I be thinking maybe a clay paste that would tolerate impressively high temperatures.

Is near such a thing on the market?
Tried googling it but cant seem to be to find anything!

Thanks in advance.
Ian