Natural stone tiles can be of marble, limestone, slate or granite. They fill grand entrances, ballrooms and bathrooms. When placed, tile is spaced apart, leaving a gap, or "joint." Grouting is the next step to fill the joint and firm the tile's placement. Make sure that you have allowed 24 to 48 hours from when you applied the adhesive before beginning to grout. Remove all spacers and clean any adhesive from inside the joints.

1
Coat the stone tile with a grout remover or tile sealer. This will help prevent stains from occurring and make it easier to remove extra grout from the tile's surface.

2
Mix the grout according to the manufacturer's instructions. Pour it onto the surface of the tiles. Use the grout float, angled at about 45 degrees, to push the grout across the surface and into the joints. Make sure to move the float diagonally across the face of the tile.

3
Clean the surface of the tile with a damp sponge, rubbing in a circular manner, after 10 minutes. Be careful not to wipe out the grout from any of the joints.

4
Shape the grout with a jointing tool if desired. Press lightly into the grout to smooth out a uniform joint. This will give the grout a different aesthetic look.

5
Wait until a dull haze appears on the surface of the tile. Once this happens, polish the tiles using a clean, damp cloth. Buff the tiles shortly after with a dry cloth. Wipe down the tile with a damp cloth again later that day or the next to help seal the grout and clean the tile.

6
Let the grout dry for a few days up to a week. Natural stone tiles will need a sealant for the surface of the tile to protect and enhance the stone's qualities. Apply the sealant using a sealer applicator.