They do have a special thinset for glass tiles and they have a mat adhesive. Neither work good. The thinset comes out the spaces and if you put it on thin the tile slides down. With the mat, the tile can't be repositioned or adjusted. I use a product called Power Grab,comes in caulking tube, run a bead along the back of the tile and put on wall. Tiles come on a 12x12 sheet. Wait 24 hours and grout with UN-sanded grout.
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