Are Gemini Harmonie tiles and Gemini Ceramic Pool tiles safe to use for an outdoor mosaic? I can't find much information about them online.

  • Have you tried contacting the company directly? – Tester101 Oct 17 '13 at 14:02
  • Glass tile and porcelain are appropriate for outdoor use. Be sure to use a top rated thin set mortar that lists flexibility (due to thermal expansion/contraction stresses) as an attribute. – HerrBag Oct 17 '13 at 17:54

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