[header] How to adhere concrete to concrete [title] Wait for a cool, overcast day to do your concrete repairs. [step] This is the best time to adhere the concrete because it takes longer for the water to dry out, and it has more time to react with the cement. [title] Buy concrete patching material. 
[step] It is available in a pre-mixed form or by buying the separate ingredients in bulk. If you haven't adhered concrete to concrete before, it is a good idea to go with the pre-mixed version, which only requires that you add water.