Adding the Finishing Touches. Seal the marble tiles.Marble porcelain tiles is very soft and prone to damage so it is important to apply a coat of high quality marble sealing agent before proceeding with the grout. This seal is also important because marble flooring is very porous and grout can cause stains in the tiles. Apply the sealing agent over the tops of the marble. Even if you prefer the color and look of unsealed marble floor tiles you can use a “grout release”-type sealer to prevent grout from sticking to the marble tiles design.

Mix grout according to the instructions on the packaging.Grout, or mortar, will be used ot fill in the spaces between the cement tiles. Be sure to wear a dust mask, safety goggles, and heavy-duty work gloves. Wear a long-sleeve shirt to avoid any possible damage to your skin from contact with the grout. Mix only enough as will be used in 15-20 minutes of work or else the extra can dry out and harden. .Dampen the spaces between the tiles design using a moist sponge. This prepares the spaces for the grout or mortar.

Fill the spaces with cement. Spread the concrete evenly over the spaces between the wall tiles using a squeegee. Be careful to avoid getting wood tiles on the tops of the floor tiles. Some will inevitably get on top of the tiles but you want to minimize the amount. Try to push it into the spaces as much as possible to create a tight fight. Wipe up any grout on top of the tiles as you go.

Use a squeegee to spread out the grout. Use a squeegee to spread out the grout and leave a smooth surface in the cracks. You can also use a gloved finger to run down the grooves and smooth the top of the grout. Use a clean sponge to wipe down the surface of the wood marble tiles. Use a damp sponge to wipe down the tops of the tiles to remove any excess grout. Try not to get extra moisture into the grout or else it can make it too wet.

Allow the grout to dry. Allow the grout to dry for the length of time required by the manufacturer. Some will require long curing times to ensure maximum strength. Seal the grout. Use a disposable sponge applicator to paint the grout with a grout sealer. This will help prevent stains and dirt from permanently discoloring the grout. It will also make cleaning easier later on. Clean tools with water or acetone. Clean your tools with water or acetone to remove the excess grout or mortar and prepare them for use once again.