How to Seal Grout Between Tiles

Sealing tile grout is an important step in laying tile flooring. Applying a sealer to grout lines can make the grout more resistant to water and stains. Unsealed grout, on the other hand, can absorb dirt and grime, making it very difficult to clean over time. If the tile is glazed, only the grout needs to be sealed. Otherwise, the tile will likely need be sealed as well. This article will outline the steps necessary to complete this home repair.

Difficulty: Moderately Easy

Instructions

Things You'll Need:

• Grout sealer (silicone, acrylic,or water-based)
• Application brush or sponge (if necessary)
• Wet washrag

1. Make sure the tile grout has set. Grout sealer should be applied at least 48 hours after putting the grout down to give the grout adequate time to dry, and some manufacturers suggest waiting two weeks.

2. Apply grout sealer to the grout lines, following the manufacturer’s directions on the container. Some brands require the sealer be put on an applicator brush or sponge, while some come in a spray can and can be applied that way. Apply the sealer in a thin, even coat making sure all the grout is covered with a uniform layer.

3. Apply the sealer methodically--begin at one grout line, go from left to right and all the grout lines traveling downward, then begin the next row from left to right--to avoid losing your place and leaving some portions of the grout unsealed.

4. Wipe the excess grout sealer off all the tiles before it dries and leaves sealer visible on the tile. Some brands of sealer do not need to be removed, so read the instructions carefully.

Tips & Warnings

• The grout on existing tile should be sealed every year or two, because sealants can wear off over time.