Thread: Efflorescence?
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Unread 06-06-2006, 06:21 PM   #1
Davery
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Join Date: Feb 2006
Posts: 123
Efflorescence?

I finished grouting last week and noticed I have a large difference in the shade of the grout. About 5% of the grout is several shades darker than it should be and about 90% is several shades lighter. I have used a vinegar and water solution with no effect. I have used a phosphoric acid and water mix (1 to 4) with no effect. I'm about to give up and stain the grout. Since I have to seal anyway, this should not be too much more work, right? Anyone have any solutions before I try the stain?

Don
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