efflouresence [Archive] - Ceramic Tile Advice Forums - John Bridge Ceramic Tile

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mullet
01-25-2003, 06:57 AM
Good to be back. Not sure the title spelling is right though.
I have a small outdoor entry that has developed a grout color imperfection. The entry has a canopy. The grout and tile was installed the same day (speed set), but on a very gloomy day. It had rained in the morning and the job was done in the afternoon, with an overcast. The grout lines near the outside edge faded to a bleachy bone compared to a tan.
1) What could of caused this?
2) Is there a fix without staining?

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tileguytodd
01-25-2003, 07:14 AM
You could try a sulfamic acid with a scrubber.Rinse well. This works on rare occassions.You may have success though.

John Bridge
01-25-2003, 01:47 PM
First of all, saturate the grout with water. Add one part acid to eight parts acid.

tileguytodd
01-25-2003, 02:01 PM
I think he meant 1 part acid to 8 parts water. :)

Wear eye protection!!!!

John Bridge
01-25-2003, 02:58 PM
Yeah, wear rubber gloves, too, especially if you use my formula. :D

Yes, eight parts water to begin with.