Pietra Castello is an acid-sensitive limestone. Wine, lemon juice, vinegar, cola, sanitary cleaners or descalers leave etch marks on the material surface — visible as matt shadows or a loss of gloss.
For all applications, a sealing treatment based on silane or polysiloxane is mandatory. It prevents the penetration of water, oil and dyestuffs and reduces the formation of stains — but it does not remove the acid sensitivity. We recommend refreshing the sealing treatment every 1-2 years.
Day-to-day care is carried out with a pH-neutral natural stone cleaner and a soft microfibre cloth. Avoid vinegar-based cleaners, cement film removers, acidic sanitary cleaners and strongly alkaline agents. Wine, coffee, oil, lemon and cosmetic products should not be left to act on the material surface for long.
For kitchen worktops, Pietra Castello is only conditionally suitable — acids from everyday cooking can leave a visible patina.
For permanently weathered external surfaces the material is only conditionally suitable. Indoors it is stable over the long term with proper care.