Repairing Cracks in a Concrete Floor

Tools:

workshop vacuum
stiff-bristled brush
scraper
chisel
ball-peen hammer
broom
dustpan
trowel
towels
kneepads
gloves
safety goggles
concrete crack filler

Use an awl and a chisel to remove any large pieces from cracks in the floor (figure A).

Sweep away fine particles using a wire brush (figure B).

Use a grease-cutting cleanser to remove any oil or other contaminants around the repair area that might prevent the concrete filler from setting up properly. Sweep up all the debris around the area, being sure not to sweep dust back into the cracks. Finish cleaning by vacuuming out the cracks with a workshop vacuum (figure C).

Smooth out any excess using a trowel (figure E).

Allow the filler to cure overnight. Add more filler if necessary.