I've only used tumbled tiles for my coasters...
and haven't had one problem with my mugs sticking to them. Everyone on our Christmas list this year that received them hasn't complained either and they're all in use frequently.
Have you tried any tumbled tile yet to make your coasters?
I could see where a polished tile that has been treated with Krylon may make the glass stick if you use something wet, either hot or cold, on top of the coaster.
Hope you find an solution to your problem. I'll have to follow this thread to see what ya'll figure out.
Cindy Lou Who
__________________ Stampin fool...will stamp on ANYTHING!
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