As an Indian gneiss, Imperial White Premium is a robust hard stone with low water absorption (0.31 %), Mohs hardness 6–7 and full frost and acid resistance. Wine, lemon juice, vinegar, cola, sanitary cleaners or descalers leave no etch marks as they would on marble or limestone — the stone is considerably easier to maintain and is ideally suited to intensive everyday use.
For internal applications we recommend a silane- or polysiloxane-based sealer at first installation. On the pale groundmass, sealing is particularly important, because oil, grease and coffee stains can otherwise settle more visibly on pale stones. On polished internal surfaces, renewal every 5–8 years is sufficient; on heavily used kitchen worktops or external applications we recommend a check every 2–3 years.
Daily care is carried out with a pH-neutral natural stone cleaner and a soft cloth or microfibre mop. Clear warm water is usually sufficient. Acidic cleaners are unproblematic in principle, but should nonetheless not be used, because they can attack the sealer. The finishes available from stock are listed in the »Finishes« block further down.
For kitchen worktops, Imperial White Premium is well suited: cut- and scratch-resistant, insensitive to heat (hot pots and pans can be set down directly for short periods, but prolonged heat exposure above 200 °C should still be avoided), acid-resistant and with good stain repellency thanks to the low water absorption. The pale groundmass does, however, show a greater tendency to stain than dark granite classics such as Nero Assoluto or Star Galaxy — you should react promptly to sauces, red wine or turmeric. The finishes available from stock are listed in the »Finishes« block further down.
For external applications, Imperial White Premium is weather-stable in the long term thanks to its low water absorption and the DNSA-confirmed frost resistance. The finishes available from stock are listed in the »Finishes« block further down.
For pool surrounds, external terraces and fountain surrounds, a slip-resistant textured finish is essential — smooth external surfaces present a high risk of slipping when wet. In areas with frequent salt contact (de-icing salt, pool chlorine) we recommend an additional annual refresh of the sealer. The pale base tone stores considerably less solar energy than dark granites, which makes the stone a pleasantly heat-restrained choice for external surfaces in hot climate zones.