How to Repair Concrete Cracks

Repairing cracks in concrete is an easy project that any handyman can do. It not only makes concrete look better, but extends the lifetime of the concrete, keeping it from the elements. These are steps on handling foundation crack repair in concrete.

Clean the floor

Before using a concrete filler, ensure that no oil or dirt is on the floor. If there are, use a grease cleaner to wipe them out. This will help the cement to bond well with the filler.

Chisel the crack clean

Use a cold chisel and a hammer to get rid of any bigger pieces in the crack. Hold the chisel at an angle and hit with the hammer to chisel the crack. This is keying the hole at the base or inside of the crack to be larger than that on the surface. This keying helps the new patch material to bond well with the old crack.

Brush and vacuum

Once you have keyed the crack, it is important to clean up and get rid of dust and debris. Use a broom, then empty the depth of the crack thoroughly.

Spread concrete patch

To use the concrete filler, cut the nozzle off the bottle and slowly fill the cracks. If you use a mixed concrete patch, mix according to the manufacturer’s instruction and then apply the patch to the crack. Check cracks in a few minutes to see if the filler has settled. You might have to add some more if it does not look tight. Use a trowel to smoothen cracks

Let it cure

Allow the filler to dry overnight or at least the time recommended by the manufacturer. Then, check again if additional patch is needed.

Seal the patch and concrete

After correcting the concrete, it is a good idea to seal it. Concrete easily absorb stains, and seal helps avoid this. There are more than a few products available for concrete waterproofing, but water-resistant polyurethane is a good choice. If the floor has a rough finish, apply the polyurethane with a brush or brush using the bristles to work the sealer into the rough surface. With a surface that is smooth, use a roller.

The beauty of water-based polyurethane is that it dries quickly, so you can put a second coat a few hours after the first. In addition, water-based polyurethanes do not feel as bad as other types of sealants. In areas that see high traffic, it is a good idea to apply three or four layers.