HMK S242 is a ready to use solvent based impregnator for use on all natural stone surfaces (soft and hard), agglomerates, reconstituted stone and terrazzo, and can be used on polished, honed and textured surfaces. By reducing water and dirt penetration, regular maintenance is facilitated. Algae, fungus and other problems occurring with exterior installations are reduced. Color enhancement will bring out the grain and structure of the stone. HMK S242 is especially suited for wall and floor surfaces. Vapor permeation is only slightly diminished. Please note that HMK S242 is not effective against oil and grease. For exterior and interior use.