How to Clean Concrete and Keep it Looking Clean Without Toxic Chemicals

You can clean concrete with a pressure washer.
You can clean concrete with a pressure washer. (Image: Hemera Technologies/ Images)

Cleaning the concrete around your home is essential if you want a nice clean exterior look. This does not need to be a toxic exercise. You can learn what concrete cleaners to use and well as tips on maintenance.

Things You'll Need

  • Concrete wash containing hydrogen peroxide
  • Bucket
  • Pump sprayer
  • Pressure washer
  • Concrete sealer

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Mix a powdered cleaning product made from hydrogen peroxide in a bucket. Let it sit for 15 minutes to give it a chance to fully activate. The peroxide eliminates mold and mildew spores, and the bubbles lift the debris to the surface for an easy clean. Transfer the activated solution into the pump sprayer.

Apply the solution with the pump sprayer. Completely soak a section of the concrete that you want to clean and let the peroxide go to work.

Pressure wash the surface at a slight angle to soften the impact of the water so that it does not damage the concrete. Turn the throttle down on the pressure washer and raise it slowly until the debris easily washes off.

Tips & Warnings

  • After the surface dries, apply a concrete sealer.
  • Clean in the morning or in the late afternoon so that the peroxide cleaning product doesn't dry too fast.
  • Wear goggles when pressure washing.
  • Never apply the cleaner to a wet surface. The water forms a barrier and limits the effectiveness of the cleaning agent.
  • Do not leave an oxygen-activated solution in an enclosed container. When you are not spraying, loosen the pump cap so that trapped air can escape.
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