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  #1  
Old April 4th, 2011, 05:41 PM
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Concrete experts

Need some help here. I f'ed up. I was using a phosphoric acid etcher to prepare my new bare metal axle tube for painting. I read the directions and covered the floor with cardboard where I was spraying it but still the wind blew this crap across the garage and all over my concrete floor. It left bleached white spray marks everywhere it touched. I threw water on it quickly but not quickly enough. I also threw some baking soda on it, hoping to neutralize the acid--to no avail.

How can I repair the damage it caused?
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  #2  
Old April 4th, 2011, 06:50 PM
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floor coating

i will check with my engineers tomorrow, however when we had some burnt concrete a few years ago we used a crystalene product called Kiem on the walls and the colors came back. Its a coating used in Europe on older concrete to restore the even colors and it cures in with the concrete so it won't peel or chip. You should check web and i will try to get you some suggestions tomorrow.
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Old April 4th, 2011, 08:20 PM
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Mineral Springs with a quick powerwash should correct your boo boo
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Old April 4th, 2011, 08:24 PM
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Park your leaking Rover on that side of your garage or later someone that's never changed the oil on a land Rover change your oil
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  #5  
Old April 4th, 2011, 08:54 PM
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Mineral Springs?
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  #6  
Old April 4th, 2011, 09:28 PM
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spirits no springs

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Old April 4th, 2011, 11:02 PM
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Jeff Payne
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Sorry, not much help with the concrete other than maybe wash the pad off with muriatic acid to get it all cleaned up uniformly.

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Originally Posted by Rugbier View Post
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This autocorrect sh!t is hilarious! http://damnyouautocorrect.com/
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  #8  
Old April 5th, 2011, 09:30 AM
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In a nut shell you etched the floor. You will need to neutralize it which it sounds like you may have.

I am assuming your floor is not painted or sealed, if it is sealed then you could try and put sealer down. But before that I think it needs to be rinsed using a neutralizer (a base) or the acid will keep burning it.

I just went through this with Benjamin Moore at work.... we epoxy sealed 14,000 sq feet of concrete...
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  #9  
Old April 5th, 2011, 09:31 AM
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Chris, you're not going to be able to reverse the bleaching of the concrete. Your best bet is a topical application of an acrylic based sealer (like the cheapest crap you can find at home depot) to the effected area to darken it to something like the rest of the concrete. Not too much though or it'll get slick and shiney. This advice is from a friend who is a very knowledgable rep for a company that produces cleaners and sealers for masonry and concrete.
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Old April 5th, 2011, 10:03 AM
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Why not?

Just finish etching all of it...
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  #11  
Old April 5th, 2011, 10:46 AM
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Thanks, guys.

I think what I'm going to try is the cheap crap sealant from Home Depot on a small patch of the etched area. If that looks ok, I will etch the rest of the square that was impacted and then seal it to match.
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  #12  
Old April 5th, 2011, 01:45 PM
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Before you get your garage all crammed full of stuff, why don't you drag everything out on the driveway, degrease it, powerwash it, and put down some of that do-it-yourself epoxy floor stuff? Its not like you aren't going to spill something else on it sooner or later.
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