Our tiles arrive pre-sealed as part of their production, eliminating the need for pre-installation sealing. However, post-installation, they will need additional coats of a high-quality solvent-based penetrating sealer. It is recommended to apply a minimum of two coats, one before grouting and another after. The sealer doesn’t affect the appearance or texture of the tiles and is easy to apply. For external installations and those in shower areas, additional coats are advisable. Depending on the location and foot traffic, future applications may be necessary.