[Zeke]

A solvent based sealer is best. Many of those have benn removed from the shelves due to the evaporative chemicals such as benzene. I think Watco makes a good one. Prfessional tile supplies have some pretty good stuff. You don't find a lot of this stuff at warehouse home stores. They only sell what sells and is easy to use, IMO. BTW, if you got the shower wet, you can't seal it until it's bone dry.