If you notice a crack in your concrete driveway, you can be sure the problem will only get worse if you leave it. Cracks let in water and moisture and this increases the size and depth of the crack and can lead to additional cracking and crazing of the concrete drive. Tree roots, standing water and impact damage can all lead to driveway cracks. Repair the problem promptly to stop further damage and improve the look of the driveway.
Clean the crack with hot water and a stiff wire brush, taking care to remove all broken concrete fragments, dust and loose material.
Dampen the damaged area, inside and along the full length of the crack with a spray bottle of water.
Fill the crack with concrete sealer or pourable grout. Fill the crack completely and leave the sealer or grout very slightly proud of the top of the crack. Most sealers and pourable grouts come with their own dispensers. Check manufacturer’s instructions carefully before use.
Smooth the excess grout or sealer over the top of the crack with a pointing trowel so that it is flush with the surrounding concrete.
Wait for the concrete sealer or grout to dry completely before using the driveway. In most cases, the sealer or grout will dry within 12 to 24 hours.
Use a mallet and chisen to break off any crazed concrete around the main crack.