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Unread 04-10-2018, 07:36 AM   #40
John Bridge
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Join Date: Mar 2001
Location: Rosanky, Texas
Posts: 68,716
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Hi Adam,

I've had the problem a number of times over the years. I have almost always refused to install tile that is that badly smeared with a water soluble glue. There no practical way to ensure a permanent bond.

Secondly, with mosaic tiles (two inches or smaller) the grout locks in the tile and bonds to the thinset. In the case of your tiles that can't happen because the glue is spread over the tile backs and across the grout joints as well.

If you have already installed the tile, hope for the best.
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