- 1. Clean the cracks with a wire brush. Get rid of loose debris and vacuum. Be sure to thoroughly remove any oil or grease around the crack.
- 2. Use clean sand to fill up the crack; if it is more than 0.5 inches deep, only fill the crack up to 0.5 inches with sand.
- 3. Purchase premixed concrete crack sealant, shake the container and cut its tip to the same width as the crack.
- 4. Apply the sealant in layers of 0.25 inches and if you need to force the sealant into the crack, use a putty knife. Allow each layer to set overnight before trying to add another one.
- 5. Do not fill the cracks beyond the surface level of the concrete. Don’t walk or drive across it until the sealant has been fully cured.
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