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Iron stains on concrete driveways, and other types of concrete, are common in areas where the iron content in water is high. Water carries the iron onto the surface of the concrete where the concrete absorbs the water and carries the iron with in into the pores. When the water evaporates, the iron is left on the concrete where it proceeds to “stain” the concrete surface.

How To Clean Iron Stains

There are several ways to clean iron stains. Iron stains are surface stains and can typically be removed with an acid based cleaner or degreaser. The use of  a pressure washer will help to remove iron from deep within the pores and on the surface of the concrete.

How To Prevent Iron Stains

The best way to stop iron from staining concrete is to stop the absorption of water. This can be done with a penetrating water repellent sealer, or a protective concrete coating.

• Penetrating Concrete Sealers: The best type of sealer to use for water repellency is a high solids, solvent based silane-siloxane blend sealer like the Armor SX5000. The SX5000 is high solids, DOT approved sealer for stopping the absorption of water on the surface of the concrete. The SX5000 will work below the surface and will not change the look or color of the concrete.
• Protective Concrete Coatings: Concrete coatings leave behind a protective film that will enhance the concrete with a satin sheen, gloss coat, or wet look. The iron water will sit on the surface of the concrete and be preventing from penetrating through the surface. Acrylic coatings are the best type of coating to use on exterior concrete.