Can anyone recommend a long-lasting product to repair cracked and broken concrete kerb stones. Also, a paint or similar that can be used on the concrete after repair. Thanks in advance.

TOA roof sealer.

For small areas you could use what I know as cement gowe. Glue cement it’s in a yellow bag. Then if necessary put neat cement on top.

 

Always best to protect the ‘wet’ cement from the sun to prevent cracking etc.

 

I normally just put a primer on and them a good quality paint eg weather shield.

 

Also what BM2 suggests sounds good. Important bit is primer.