Small hairline cracks in a tile can be concealed with matching latex paint, applied with a cotton swab. Reglazing the tile can also conceal hairline fractures and will give a smooth finish, sealing the tiny cracks.
During a guest appearance on NBC's Today Show, the Property Brothers suggested that small fractures in a ceramic tile can be covered with latex paint. A color must be chosen that is the same as the tile and applied to the cracks with a cotton swab. Re-glazing with a thin layer of ceramic tile glaze can also conceal small fractures in the ceramic tile, providing a smooth and clean finish.