How to Fill a Hole in the Exterior Concrete Wall of a Home Before Painting

Put on your safety gloves, goggles and protective clothing.

Use a hose to wash away any loose dirt, concrete or debris from the hole in the wall. You can also use a high-power air pump to do the job.

Chip away any hairline cracks around the hole, using a cold chisel and hammer. Chip away at the inside of the hole to make the inside as level as possible. This will help the cement to settle better once you pack it in.

Remove any remaining debris with a wire brush.

Dip a fiber brush in the acrylic resin, then apply the resin to the inside of the hole. Cover the entire hole with the resin. Allow the area to dry.

Mix the concrete patch or dry cement mix according to the manufacturer's directions.

Pack the hole with the concrete mix, using a metal trowel or a wooden float. Scoop the concrete on the end of the trowel and spread it inside the hole. Continue adding concrete until the hole is full.

Lay the trowel flat on the surface of the concrete in the hole. Move the trowel side to side to smooth the area. If necessary, remove any excess cement from the hole by scraping it away. A metal trowel creates a smooth finish, whereas a wooden float provides a textured one.

Allow the concrete to dry for at least two hours. Cover the repaired area with plastic sheeting. According to Aubuchon Hardware, you'll need to keep the area covered for up to five days.

Remove the plastic each day to wet the surface. Replace the plastic after wetting.