How to repair cracks in a concrete driveway: 1. Chisel out the crack to create a backward-angled cut, using a cold chisel and a hammer. 2. Clean loose material from the crack using a wire brush, or a portable drill with a wire wheel attachment. 3. Apply at thin layer of bonding adhesive to the entire repair area using a paint brush.
A poly injection is a viable solution for concrete driveway crack repair. Poly injecting is done by drilling small holes into the slab and injecting polyurethane foam. The foam acts as a crack sealant and helps move the concrete back into its original position while expanding to fill the cracks.