Repairing Cracks in Concrete: 7 Minutes is All You Need- Repairing Cracks In Driveway ,We filled the cracks with silicone filler of some sort for concrete repair and if sure did a great job filling the cracks in the driveway however it left white lines and grey ones on the driveway!How to Patch a Cement Driveway | Home Guides | SF Gate1. Patch small driveway cracks by rinsing out the crack with water and scrubbing it with the steel-bristled scrub brush. Allow to dry. Fill the crack by squeezing mortar repair compound from a ...