How should grouting be done?
Use a non-sanded grout such as “Polyblend Non-Sanded.” Use a grout float with a rubber face to spread grout over tiles. Ask your tile installer about grout color suggestions. Selecting grouting colors is difficult because of the many colors in the image so something neutral in a color that most pleases you is best. Seal the grout lines with a penetrating sealer such as TileLab 4Care Penetrating Sealer, Grout & Tile Sealer by Custom Building Products available at most hardware stores. Avoid using sealers with high gloss or a built-in finish. For tumbled marble tiles, you would apply the sealer to tile surface and grout lines to avoid water damage.
