I'm regretting choosing cement tiles already, but they are purchased so I'm just going ahead with it. Clé Tile recommends "non-pigmented cementitious grout" for their cement tiles--without naming a product. I don't believe my contractor has installed these before. The contractor recommended Mapei Keracolor U unsanded grout, which is cementitious but NOT non-pigmented--it only seems to come in pre-mixed colors, as far as I can tell. It seems the concern is that it can bleed / smear/stain the cement tiles if it has a color. Has anyone installed cement tiles before? If so, what grout did you use? Can anyone point me to a non-pigmented cementitious grout or do I just go with a lighter color and ask them to be very careful when they apply it?