We have a pool area 20+ years old with a concrete area surrounding
it.
It has joints that were filled with wood at one time which has rotted.
Can we fill it with cement then use something like sika flex on top.
Want to avoid sand or backer as it is about 5 inches deep but variable
and about 1 inch wide?
I would think that the compressions etc would be mimimal now?
We are in the south where it never freezes.

Any suggestions would be appreciated.

Philip.