Well, I did a trial with a few tiles and then covered them with polyurethane. The trial didn't necessarily go entirely to plan but I was able to establish that PU will be too soft. Epoxy is likely to yellow even indoors, so that leaves me with the following solution: 1. make the tiles thicker (not a big deal) use tile selection and a thicker tile bed to enable a relatively flat surface to be made 3. seal it with a thin polyurethane to protect from mess Thanks for the contributions.

I went vertical so tall. Helps to raise height. It will also match your 300 floor tiles I have silver grout with antique white tiles. It’s a personal choice you can’t go wrong either way.

Where horizontal and vertical meet should not be grouted because it needs something flexible, something we learned the hard way, twice, in different houses. Make sure your tiler redoes the waterproofing properly too.

Hi Angel, because you’re only after one tile, it’d be worth a call to some of the companies that specialise in vintage / retro capping tiles as, unless they have large numbers, they often have stock not listed on the website. Alternatively, Schots have a very similar shaped tile, which they call a dado tile and tile paint is much improved, so that may also be an option. Good luck