How can I remove rust stain from a concrete driveway?

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I have tried a pressure washer with special concrete concentrate, straight bleach and even KLR but nothing seems to take it off? Any other suggestions?

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  1. Diana says:
    June 22, 2009 at 4:57 am

    How to Remove Rust Stains from a Driveway

    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.

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

    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.

  2. edgarrrw says:
    June 22, 2009 at 4:57 am

    Muratic acid will do the job, be careful with it use gloves and do not breath.

  3. Boss says:
    June 22, 2009 at 4:57 am

    hydrochloric acid the same acid as u use in a pool use very carefully.

  4. tracey b says:
    June 22, 2009 at 4:57 am

    there is a rust remover you can buy

  5. Brendan R says:
    June 22, 2009 at 4:57 am

    Hydrochloric acid, HCl which can be purchased as Muriatic Acid at any hardware store. Wash the driveway down with a hose first and let it dry. Make sure there is NO bleach around – they form chlorine gas when combined!! Test a small area first it may discolour the pavement and you don't want to have a funny shaped spot on your driveway. Straight CLR, if left to sit should work, but if you tried that with no luck, try this.

    Cheers.

    Best answer?

  6. Serious Mandy says:
    June 22, 2009 at 4:57 am

    Whink Rust Remover. Sold in a small brown bottle at Wal-mart. Works wonders!!

  7. patriotnutrients says:
    June 22, 2009 at 4:57 am

    have you tried WD40? you may be surprised..

    then youll be asking how to get the WD40 off the slab..

  8. anthonyinkc says:
    June 22, 2009 at 4:57 am

    Professional maintence guy here-

    #1 CLR—works great

    #2 VINEGAR, YES VINEGAR. It's cheap too

    Your avitar is cute too

  9. cosmoestyle says:
    June 22, 2009 at 4:57 am

    try a wire brush ,,, safe and easy… no dangerous chemicals… no wasted over spent money…..try it , it works…the wire brush will take off a fine layer of concrete. this will give you what you desire

  10. flowerpower says:
    June 22, 2009 at 4:57 am

    Try Rustblast by KBS coatings. Keep stain wet with Rustblast (comes in spray bottle) for about 20-30 minutes then hose off. Can be used on a variety of surfaces including concrete.

  11. Donkey says:
    June 22, 2009 at 4:57 am

    This site has some of the best tips and tricks! They specialize in chemicals for pressure washing!

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