concrete for long-lasting household projects

How to Repair a Crack in Your Concrete

by Kyle Carpenter

Concrete is a durable material, which makes it ideal for things such as driveways, sidewalks and porches/patios. Although it is durable, over time it can begin to crack. When you get these cracks in your concrete, it's important to do something about them to prevent the crack from spreading and causing the concrete to breakdown further. See below for instructions to repair a concrete crack.

Tools & Materials:

  • Chisel
  • Hammer
  • Stiff bristle brush
  • Broom (or shop vacuum)
  • Concrete caulk
  • Concrete patch
  • Putty knife


1. Begin by chiseling the crack with a chisel and hammer. You will be filling in the crack, but first you need to clean out the crack to be sure the caulk or concrete patch will have something solid to adhere to. Take the chisel and hammer and begin to chisel out the crack at an angle so the inside portion of the crack is being chiseled more than the outside.. 

2. Once you have it chiseled out, remove the loose concrete using a stiff bristle brush. Then use a regular broom or shop vacuum to remove the pieces of concrete and any other debris from inside the crack. Again, you want a solid surface for the caulk or patch to adhere to in order to prevent the patch or caulk from falling out or crumbling.

3. Now take a look at the crack. If it's smaller than two inches, you can fill it with concrete caulk. Cut the tip of the caulk off to fill the size of the crack. Then smooth it with your finger or using a putty knife. If the crack is larger than two inches, you'll want to use a concrete patch or a quick dry concrete. Fill in the crack using the patch or the quick dry concrete mix (mixed according to the manufacturer's directions). Smooth the concrete using a float. You want the concrete to be level and even with the concrete already in place to prevent it from cracking and crumbling.

If you have a lot of cracks in your concrete, or it is an un-level surface, you can have your concrete resurfaced. Contact a company like High Definition Concrete to have this done in order to ensure it is laid properly for a longer lasting concrete surface. Talk to the concrete company about having your concrete resurfaced with a stamped finish or even a stained concrete finish for a textured and updated look.