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Unread 03-06-2005, 06:28 PM   #1
DeniseW
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Mapei grout problem...help please!!

We have used Mapei Chamois grout, the color pre mixed in the bag already. Well, it is drying w/ a whitish color in some places. If you take your finger and wet it, it goes back to proper color. I have tried the tech line but of course it's sunday and no one is there Does anyone have any suggestions? My husband didn't want this tile in the first place so I am praying it's a minor thing...please help me!
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Unread 03-06-2005, 06:29 PM   #2
Davestone
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I've had Mapei actually turn yellow the next day, but a good cleanung and it turned out fine.
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Unread 03-06-2005, 06:44 PM   #3
DeniseW
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what did you clean it with? I am reading it may be we used too much water in the wipe downs.
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Unread 03-06-2005, 06:48 PM   #4
Davestone
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I used sure-clean,but H.D. and lowes sell a haze and latex remover.Also a 50/50 white vinegar and water works well.I'm sure it's o.k., unless you mixed it too wet or flooded it wiping it,i'd wait a day, then clean it,you'll be fine,you could always use an enhancing sealer to darken it, if you have to.
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Unread 03-06-2005, 06:52 PM   #5
doitright
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Hi Denise, Welcome!

What Dave said.

Do you have any grout haze on your tiles?
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Unread 03-06-2005, 06:56 PM   #6
DeniseW
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No we have no haze on the tile itself, just in various places the Chamois(medium brown) grout is quite white looking in some places after letting it sit (lemme see...5 hours later). So what is the most preferred solution? Acid wash or sealer colorant? We don't have the entire floor grouted yet, should we just finish it up...and do the colorant/sealer or acid wash all at same time?
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Unread 03-06-2005, 07:34 PM   #7
doitright
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Hi Denise

Yes, complete grouting the floor. Try to mix small manageable batches. Also try to keep the consistency the same for each batch.
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Unread 03-06-2005, 07:38 PM   #8
DeniseW
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yup, that is what hubby did. Mixed a smaller batch. From what I am finding on the internet, I think we used to much water in the wipe down. So now it's a matter of figuring out which is best....color sealant or acid wash.
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Unread 03-06-2005, 08:37 PM   #9
jdm
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Try the 50:50 vinegar wash first. You can always go on to colorant if you're not satisfied.
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Unread 03-06-2005, 08:46 PM   #10
DeniseW
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ah yes, I read about this. I read that someone had the grout turn lighter w/ that treatment .... what would cause this..sunlight? Hubby is tempted to just pull whatever he has done out and restart. He has about a third of the 170sqft done.
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Unread 03-06-2005, 08:52 PM   #11
doitright
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Hi Denise

He better get on it if that's the route he's going to take. I never heard of vinegar & water yellowing the grout. Maybe I misunderstood the comment?

Personally, I would try the vinegar & water 1st. That's just me.
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Unread 03-06-2005, 08:54 PM   #12
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Typically what happens is that with a little too much water you wash out some of the colorant in the grout leaving a thin film of whitish-gray cement on top of the correctly colored grout. The acetic acid in the vinegar actually dissolves the cement in the top bit of the grout and exposes the color you want.
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Unread 03-06-2005, 09:04 PM   #13
DeniseW
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hmm well we might as well try the vinegar route b/c he can always choose to use a colored sealant if the vinegar doesn't work, correct?
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Unread 03-06-2005, 09:07 PM   #14
doitright
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Yep, or still gouge it out.
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Unread 03-08-2005, 07:41 AM   #15
DeniseW
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Another question

alright, hubby used less water in the wipe down (he didn't really use a whole lot in the first place but he REALLY watched it this time)and the rest of the room turned out just fine. So my next question is ...should we use the color sealant over the ENTIRE floor or just the effected area? Will there be a noticeable consistency difference? We haven't tried the vinegar yet, we wanted to make sure the grout had dried totally.
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