Best sealer for White Thassos (and another stone)?
This is actually for the bathrooms, but more traffic here, so....
We are going to be using a Thassos mosaic as a border over the tub and as a backsplash over the vanity. We'll also be using Thassos to trim out the niche and for the shelves in the niche. What is the best (and easiest to use) sealer for Thassos?
We'd used 511 Porous Plus for the guest bathroom a year or so ago on the listello border tile (a mix of travertine and marble strips) and travertine floor tiles (and I think the grout? Is it good for grout, too?). I didn't love using it; it left a tacky finish no matter how quickly I buffed off any excess. We want to be sure the Thassos is protected as best as it can be, so if 511 Porous Plus is the best sealer for that, I will certainly get that (although this time the tile guy can have the fun of applying it!).
We'll be using travertine tile in another bathroom: honed Coral Peach travertine for the floor, split-faced Amber trav mosaic as a border over the tub, and as a backsplash over the vanity. Is the 511 Porous Plus our best bet for those, or some other sealer?
Also, should we stick with the same sealer for all of the grout? The field tile in both bathroom tub areas will be ceramic (porcelain?), floor tile in the first bath will be porcelain--all with minimal grout lines (at least, that's the plan).