I want to get our circular concrete dipper back into action. It hasn’t been used for a few years because it has a few cracks that means it leaks slightly (not much it’s still 3/5 full but it has been wet obviously!) I was wondering if it’s possible to repair either by filling the cracks with concrete or bitumin or is does it make more sense to dig out and concrete in a new one? Has anyone repaired or relined one before?