But despite serious competition with modern artificial materials, the use of these natural materials (marble and granite) is growing. This is due to the fact that these materials have obvious advantages. Granite was created by nature itself, thanks to this it does not have any specific technical characteristics. It often happens that the stone has pores and caverns, various chips and other defects. This later has a negative effect on the appearance of the material on its hygiene qualities. If this stone is used for external finishing, then water can get into the pores that can quickly destroy the surface in the case of freezing. Because of this, before the use of natural stone, chips are removed, and then grinding granite. The danger to the stone is also represented by salts contained in the masonry mixtures and wall materials, as well as in water, which falls in different ways on the stone. To solve these issues, many ways have been developed today. To do this, use the method of sealing caverns and pores using different polyester and wax mastics, as well as covering the outer surface of the stone with different decorating varnishes.