Without more info (or better yet a photo) of exactly what sort of damage you need to repair, it's a bit difficult to give a good answer here. In general you can use hydraulic cement or one of the various concrete repair kits/epoxy repair kits that can be found at most home improvement type stores.
Without more info (or better yet a photo) of exactly what sort of damage you need to repair, it's a bit difficult to give a good answer here. In general you can use hydraulic cement or one of the various concrete repair kits/epoxy repair kits that can be found at most home improvement type stores.