How to remove rust stains from a driveway

Written by ehow contributor
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Iron can leave rust marks on your concrete drive that may seem impossible to remove. Here are some methods to use for removing those unsightly red stains.

Skill level:

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Things you need

  • Muriatic Acid
  • Tri-sodium Phosphates
  • Garden Hoses
  • Scrub Brushes
  • Baking Soda
  • Rubber Gloves
  • Buckets
  • Pressure Washers
  • Safety Goggles

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  1. 1

    Mix 1 ounce of tri-sodium phosphate (TSP) in a gallon of hot water. This chemical can be found at hardware and paint stores. Wet the concrete and use a scrub brush to apply the solution. Scrub vigorously and let the solution soak into the concrete for 10 to 15 minutes. Rinse well.

  2. 2

    Try a product called Iron Out, which is sold in plumbing supply stores.

  3. 3

    Combat really bad stains with a pressure washer and muriatic acid. Apply the acid as directed by the manufacturer, leave it to soak for a few seconds, and follow with a pressure washer set at 2,500-3,000 psi. Sprinkle baking soda over the cleaned area to neutralize the acid and wash again.

Tips and warnings

  • Concrete is porous and should be sealed to prevent staining.
  • Promptly rinse fertilizers containing iron off concrete surfaces.
  • These products can burn eyes and irritate skin. Follow the manufacturer's directions and precautions carefully.
  • Muriatic acid is dangerous and should only be used as a last resort. Do not wash it into storm drains.

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