lol i was just thinking about this. i put some #845 on my shower door today so water would run off the door and stay in the shower before i open it and it all runs on the floor.
maybe on the tile walls, i wont suggust it on the floors.
As long as you don't put it anywhere that you step or hold on to when youre wet you'll be fine. I did the sides of my tub with NXT 2.0 in the past. Worked alright for a while