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Unread 10-10-2007, 03:50 PM   #1
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Join Date: Oct 2007
Posts: 1
slate sealing and finishing

I'm an old DIY and retired semi-contractor and done about everything but I recently installed interior slate tiles (at Lowes from India) for the first time and I've already applied two coats of a water based flouropolymer impregnator and originally intended to float a coat of true moisture cured urethane on the slate to provide for "filling" some of the irregularites as well as to provide a super hard finish. I've already used urethane multiple times in the past on wood and concrete with great success. However, I notice during research that all the references are to use a solvent or water based finish with matte, semi-gloss, or gloss finish intead for vapor permeability and have seen some of your thread by folks who despise urethane (because it's so hard). What's the real reason for the concern? Will the slate eventually "sweat" under the urethane and mold or something? Straighten me out please.
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Unread 10-10-2007, 04:27 PM   #2
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Join Date: Apr 2004
Location: Naples Fl.
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Well, stone needs to breathe, and expel water,even limestone which lives in water.There are urethane coatings, but they tend to be softer than the stone and will lead to maintenance problem, and make it harder to restore the stone later.

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