Forms a colourless barrier and helps to protect porous stone surfaces from water, dirt, oil, grease, soot and lime scale, making treated surfaces easier to keep clean. Protection for polished and unpolished natural and artificial stone including limestone, marble, travertine, slate, sandstone, quartz, terrazzo, basalt, concrete and all other types of masonry surface. Suitable for internal and external use. Maintain with LTP Stonecare.