Over 15 years ago, I used pure white silicone with a tile that
matched. Incredibly easy, and still in very excellent condition,
no concerns about mold, mildew, or staining. With the tiles
snugged up against each other.
Grout is the weak link in a shower wall tile job. Not for me.
No grout.
I gave details a few years ago.

On Jan 10, 12:16*pm, KOS wrote:
Hi, I will have my bathroom totally gutted out... Old tile mud job
will be gutted... Is it necessary to use epoxy grout in the shower???
Thanks
KOS