Clean the grout thoroughly and let it dry completely
Remove any dirt, grease, soap scum, or mildew
Choose the right grout sealer for your grout type
Test the sealer on a small hidden area first
Apply the sealer with a brush, applicator bottle, or sponge
Focus on the grout lines, not the tile surface
Wipe excess sealer off the tile before it dries
Let the first coat dry for the recommended time
Apply a second coat if needed
Keep the area dry and avoid foot traffic until fully cured
Reapply sealer as needed based on wear and product instructions