[padiyguy]

Thanks to all for the replies. So I probably won't go with that product or anything like that. I don't want to bother with the upkeep.

So I don't need to seal this ceramic floor before grouting based on my limited research. This tile was installed in another part of my house by a tile guy. It looked great after they got done with the install but then after it dried the tile lost it's luster. I don't think they used any sealer before/after.

Is it possible there is a grout haze on it? If so, what can I try to restore the luster?

Also when I install the new floor, no sealer before? What about after, just seal the grout?

Thanks!