R
Rookery
Caulk usually, sometimes grout. Strictly speaking it's a movement joint and should be siliconed but I rarely do it that way cos the ceiling usually needs painting once I've finished.
Harsh that! I worked on a site of 300+ houses when I was 17 or so. Painters were ar#ehol#s, kept painting all the walls in the bathroom knowing full well we were tiling the wet areas. After weeks of arguments I began to write co#k in primer on the living room walls. Completely invisible until they started to emulsion. Took about 12 houses but they soon got the idea.I Silicon to the ceiling if I don't like the customer!
(and smear too!)
looks fine......I bet white caulk looks good against black tiles and grey grout