All stones, due to their granular construction, are porous to a greater or lesser extent and most granites fall into the latter category. To reduce the slight ability of granite to absorb liquids we treat the surface with a proprietary sealer that penetrates the surface and fills the microscopic voids between the crystals. This process is first done in the shop at the completion of manufacturing and again when installed. However, you should be aware that with the lighter colored granites you may experience slight darkening of the stone in areas where water has been allowed to stand, but this should fade away as it dries out. Beetroot, wine and cooking oil, particularly when hot, may cause a stain on your marble or granite work top, and you should always clean this up immediately with paper towel. If stains appear refer to "Removing Stains"