My garage roof is made from that fibre board/cement board stuff (sorry I
don't know the correct term but you know what I mean)

A couple of the panels have now cracked.

Is there a way to repair these.

I did think of filling the crack with some sort of silicon or sealer both
from the outside and inside.What type of sealer should I use?

Is there a better way to repair these.
I am planning on replacing these panels when (if) the better weather comes
but hopefully can just repair for the time being.

cheers

Kin