Yes! You can still seal your tiles and grout in your bathroom. You will need to clean your bathroom to remove any soap scum or mildew that has already formed in your bathroom. If you are using a strong harsh cleaning agent we recommend that you rinse the area down with water thoroughly to remove any residue from the cleaning agent. Once this has been completed, you can seal your bathroom with our Grout, Tile & Stone Sealer – Quick Drying Aerosol, or use our Grout, Tile & Stone Sealer – Quick Drying liquid. To help remove soap scum, use our Sure Clean cleaner. If removing mould and mildew, use household bleach.