Waterproofing Tile grout is essential in a bathroom to prevent moisture from seeping into the walls and floors, which can lead to mold and other issues. There are various types of grout available, and not all of them are waterproof. Make sure to select a waterproof or water-resistant grout.

Ensure that the surface is clean, dry, and free of debris before applying grout. Remove any old grout or adhesive residue.Use a clean bucket and the recommended amount of water. Mix until you achieve a smooth, lump-free consistency.