It is inevitable that concrete will soon develop chips and small cracks. Though these minor problems do not post any structural threats, it would be wise to address cracks as soon as possible through a concrete repair. Whenever chips or small cracks appear, it is certain that wear and tear would follow. Follow these instructions to repair small concrete cracks that are 1/4 to 1/2 inch wide: Difficulty: Easy Time Required: One to two hours Procedure: Clean the crack using a wire brush. Remove loose debris and vacuum the crack. In cases where dirt, oil or grease is near or remains in the crack, remove it by a thorough cleaning.