Do not use any grey mud or thinset that can penetrate through to the light stone.
White marble grey thinset.
I am about to tile my final room.
Josh that is how long it takes the thinset to fully cure.
If it does turn white again and you seal it you are still going to have water penetrate the marble along all the edges through the grout.
Oh and that part was done a week or so ago that grey thinset is dry and will be covered with white thinset for tiling i had some grey left over from the floor mike willis nov 29 13 at 2 59 please please do consider using kerdi everywhere from and for the floor pan and up onto the walls as far as the walls could possibly get wet.
Suitable substrates include interior and exterior floors countertops and walls.
I have never seen white marble turn that grey from water before though.
If you want light grout use white thinset.
Also after installation continue to seal your stone at least one time a year to prevent future staining.
The light gray is also a fine choice but keep in mind that it will darken and maybe not match the tile color quite as well over time.
Fortified thin set mortar is a professional formula all purpose mortar polymer modified to provide good bond strengths.
Near the end i could not find any white thinset anywhere of the same brand that i was using so i bought the dark gray one and finished the last 10 15 tiles using the dark one.
If you use dark grout use gray thinset.
For this reason gray thinset is recommended.
Now the marble looks gray yellow and dingy.
I just had some beautiful white calacatta marble mosaic installed in my bathroom and picked a light gray grout.
Gray thinset eliminates this risk.
In my other room i used white thinset fortified thinset flexbond as my tiles are a light colour tile.
You can also choose the color based on location.
The contractor swears that there is no way that the grout stained the stone and that the grout is just making the stone look darker.
White is usually used for walls and counters and gray for floors.
Slate tile is typically less porous than travertine and has a dark colored body.
Versabond cures quickly and adheres to most surfaces.
The custom building products versabond 50 lbs.
What kind of marble is this.
Use a non sanded grout to protect both the marble and the grout from discoloring too much.
I don t really see how it will get any better.