What is Grout Sealer?

Grout Sealers Used on Tile Grout Kitchen Backsplash

Grout Sealer is very important to the tile installation project.

Grout Sealer is used to prevent moisture from penetrating the spaces between the tiles that are filled with tile grout. Sanded grout is made of cement and sand, while Unsanded grout doesn't have any sand. All Sanded and Unsanded grout needs to be sealed.

Grout Sealer will prevent water and other liquids from entering the grout, and will help to keep stains from liquids reduced. 

Is it Hard to Install Grout sealer?

No, it is easy to apply grout sealer. It does take some time to install the grout sealer, but it is something any homeowner can do. All manufacturers of grout sealer have detailed instructions for using their products on the bottles of grout sealer. Some of the grout sealers can be applied with a foam applicator pad, making the entire job move fast if using small tiles like mosaic tiles. If using large format tiles, then there are some grout sealers with application brushes to allow you to focus on the small grout lines.

When and How Often Should You Apply Grout Sealer?

Grout sealer should be applied to new tile installation projects after the grout is fully dry. Any water remaining in the mixture will not allow the grout sealer to fully impregnate the tile grout. It normally takes 24-72 hours for the tile grout to dry, and the grout manufacturer will have installation instructions specifying the drying time. 

Older tile grout will need to be resealed with grout sealer every 1-2 years. Grout sealer acts like car wax. A car that has wax on it will make any water that lands on the surface bead up. Your tile grout should have the same effect, and you can test your grout sealer by dropping water on the surface. If it still beads up, then the grout sealer is still good. If not, then it's time to re-apply the grout sealer.

Should I seal Epoxy Grout or Pre-Mixed Grout?

Epoxy Grout is similar to a fiberglass or plastic type product after it cures, so it never needs sealing with grout sealer. Pre-Mixed Grouts contains lots of Acrylic and Latex, and also acts like a plastic when it cures, so it doesn't need grout sealer either.

What Grout Sealer do we Recommend?

Grout360 has tested many grout sealers on our sanded and unsanded grouts and we have recommendations for our customers based on our test results.

The two grout sealers that we recommend are made by Miracle Sealants. They are 511 Porous Plus and 511 Impregnator.

511 Porous Plus is the better of the two, but a little more costly. This material can also be used as a presealer when working with porous tile materials. 

These two products are available with the affiliate links below.