Polishing porcelain can expose tiny pores at the tile surface. Some manufacturers apply a factory sealer to reduce staining, but this should be verified rather than assumed from the glossy appearance. Ask the supplier what treatment the particular tile has received.

Check Whether Polished Porcelain Arrives Pre-Sealed

Glazed and unglazed polished tiles also differ in construction and performance. Obtain the relevant care instructions before choosing cleaners or adding another coating. Consider wet-area slip performance separately; a shiny surface does not establish suitability for a shower floor.

Manufacturing and surface treatment influence stain resistance and maintenance.