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Unread 01-13-2020, 09:39 PM   #6
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Join Date: Jul 2001
Location: Boerne, Texas
Posts: 89,556
Not at all sure precisely what mighta been poured yonder in the Granola State ten years ago, Michael, but what you have looks, at a glance, like gypsum. Exact composition best guessed at by the tile installation product manufacturer who is gonna recommend his product to bond to it.

You have a gaggle of such product manufacturers out there and you'll just hafta find one convenient to your area. MAPEI, Laticrete, Custom Building Products, are the first to spring to mind. Custom is based in the LA area, the other two on the Right coast. And there may be others out there. Check with a local tile store and see whose products they sell and maybe ask them for the name of a product rep from that manufacturer.

Google might also be your friend.

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