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Unread 01-27-2020, 01:18 PM   #1
Silva1992
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Help!! Water Marks on Polished Porcelain

Hi my name is Rafael Silva. I own a tiling company. We are having a problem i can find the solution for. We installed a 23'x 23' room of polished porcelain. Installation and grout is perfect. We only have a problem with "water stains" on most of the tile. The stains do not come out!. We have tried everything possible. We did use a little bit of muriatic acid dilluted into water(2caps for 5 gallon of water). general contractor is blaming it on the acid. I just can't see it being the acid as i have used it to clean tile for years, i have never had this issue. Has anyone here ever had this issue? If so do you know any solution other than ripping it up? I've tried pouring straight acid into a loose tile and the reaction did not happen!. Thank you in advance for anyone that takes their time to reply!
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Unread 01-27-2020, 03:00 PM   #2
speed51133
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Why would you ever use muriatic acid??

That is so corrosive on everything, even if the liquid doesn't contact, the vapor will.

When you poured straight acid on a time, how long did you let it sit?

I'm sure the contractor is correct, that it is acid etched.

Only solution I can think of is a floor buffing machine and using a Polish compound.
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Unread 01-27-2020, 10:30 PM   #3
Kman
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My first go-to on porcelain would be vinegar and water 50/50, and if that didn't work, sulfamic acid crystals, after the grout is about ten days old.

Then I might try a magic eraser.

But whatever I try, I would test on a small, inconspicuous spot first.
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Unread 01-28-2020, 01:09 PM   #4
Dave Gobis
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Where is the tile from? That looks like some nano wax problems I have seen.

Something that is acid etched looks like a pineapple. That looks more like mineral deposits from watermarks.
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Unread 01-28-2020, 02:30 PM   #5
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