I don't know if this is an option in TV construction, but we had our kitchen floor tiled almost 4 years ago and we had them put in the epoxy type of grout. It dries non porous and does not need to be sealed. We like it very well. It does appear to be darkening after several years, but I'm hoping a good cleaning will correct that.
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Greg
A pessimist is an optimist with experience.
"In my many years I have come to a conclusion that one useless man is a shame, two is a law firm and three or more is a congress." - John Adams
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