"Steve W." sjwNOSPAMatripnet.com wrote in message
...
Hello, I am tiling my floor with marble tile this weekend and picked up a
50lb bag of Mapei ultraflex rx thinset grey color.
I have heard that you should use white thinset with marble. Is the grey
thinset okay or should I go with white? The marble tile is mainly white.
regards
Steve

the gray is fine as long as you like gray edges to your white marble tiles.
it can stain, so that's why they state on the package to use white thinset.
why would you think they put that on the package if they didn't mean it?