It’s a given that a concrete slab will become cracked over time. This is particularly true at cold joints, where two concrete slabs meet that were poured at different times.
If the concrete slab is outdoors, such as a driveway, cracks need to be sealed properly. This keeps water from seeping under the slab and eroding the soil, which can cause the concrete to settle.
To seal a cracked concrete slab:
- Remove any debris or loose concrete in the crack using a screwdriver, followed by a wire brush.
- Use a broom or leaf blower to clean out the crack.
- Fill the crack with concrete repair caulk, such as Polyurethane Concrete Crack Sealant from Quikrete.
- On cracks that are wider than 1/4” push foam backer rod into the crack with a screwdriver, so it’s 1/2” below the surface, then fill the crack with concrete repair caulk.
Watch this video to find out more.
Concrete driveways require a lot less maintenance. You want to keep them nice and clean, but more importantly, you want to be sure you fill up any cracks you might have, especially a crack like this.
Now, this is called a cold joint,