How to Waterproof Shower Stalls

Apply tile-and-grout sealer over the surfaces of the newly installed tiles with a paintbrush, covering each tile with a thin, even coat. Try not to get the sealer in the open gaps between the tiles.

Let the sealer dry for 12 hours.

Grout the tile surface, scraping the grout over the tiles with the long edge of the grout float and pressing it into the spaces between the tiles.

Allow the grout to sit in the spaces for 10 minutes. Use a sponge to wipe up the excess grout. Let grout set for at least 48 hours.

Apply another coat of sealer over the surface, covering the tile and grout both at the same.

Allow the sealer to set for 12 hours. Apply a second coat of sealer. Let it dry 12 hours.

Caulk along all the corners and lines where the walls meet each other and where they meet the floor. Let the caulk dry for 24 hours before using the shower.