How do you seal corner shower cubicle?

Contarary to popular mis conception you are not sealing the tile as much as you are sealing the Grout.

The finish on the tile is a Glass glaze & really needs no sealer...

Go to the Home Depot or Lowes & tell them you are looking for a good Tile grout sealer & then just read the instructions or visit their website for the video.. It ain't rocket science, any one can do it..

PLEASE make sure you start with clean & Dry Grout though, otherwise you are just sealing in the mold, mildew & stains..

Do web search for Aqua mIx used to be a great product, I think it is still avail