How To Clean And Seal Concrete

Lead Image
  • 5-15 hours
  • Intermediate
  • 100-300
What You'll Need
Concrete cleaning solution
Concrete sealant
Paint roller
Extension pole
Scrub brush
Paint roller pan
Garden hose
Power washer

Cleaning and sealing a concrete floor, such as a driveway or patio, is a great way to improve the appearance and increase durability. The process can be done in a few hours.

Step 1 – Select a Power washer

If you do not own a power washer, you can either purchase one from a local hardware store or rent one from any tool rental shop.

Step 2 – Prepare the Concrete

Use your hose to spray down the concrete. Apply any cleaning chemical that is specifically formulated for cleaning concrete. Bleach and water will also work well. Some commercial solutions are specifically designed to remove oil, so consider one like this if you have noticeable oil stains in your driveway.

Step 3 – Scrub the Concrete

Use a scrub brush to thoroughly scrub the concrete with the cleaning chemical. Pay special attention to areas that show noticeable stains. If possible, use a scrub brush with a long handle. This will help reduce the time and effort needed to cover the whole floor.

Step 4 – Rinse the Concrete

Connect your power washer to your hose and turn it on. Move the pressure washer wand back and forth across the width of the concrete, working your way down, until you have thoroughly rinsed all the cleaning chemicals from the concrete. You should also focus on areas that had stains to remove any excess residue that may have come up with the cleaner. If any stains remain, you can repeat step 2 and re-rinse the concrete.

Once you are satisfied with the look of the concrete, allow it to dry completely before proceeding. Typically, this will take around 24 hours, though hot sun or cool air may shorten or prolong drying time.

Step 5 – Apply the Concrete Sealer

Pour the concrete sealer in the roller pan and use the roller with an extension to apply the sealant to the concrete. Use slow, gentle motions until the concrete is completely coated by the sealant. You will need to apply 2 to 3 thin coats of sealant. A coat that is too thick can lead to bubbles that are not only unattractive but can reduce the effectiveness of the sealant.

Step 6 – Let Dry

Allow the new sealant to dry before allowing anyone to walk on the concrete. This will average between 24 and 48 hours depending on the climate in which you live.