We do not seal our bluestone, so its porosity allows liquids from leaves, food, drinks, etc., to enter the stone, resulting in stains. When used indoors, we recommend lithofin, which covers the tabletop with a thin protective layer. As this wears off over time, especially when the top is used intensely, you should regularly reapply the treatment. The coating prevents liquids from permeating the stone upon contact but does not make it 100% impenetrable, so it is best to wipe off any liquid as soon as possible.
Stains are less noticeable on our darker, fumé finishes. These finishes are created by impregnating the stone with a color deepener, which is available for purchase at Sempre. Always make sure to leave enough dry time between the different layers. If stains occur, Sempre can suggest an appropriate treatment.