A clear, penetrating, breathable water repellent and consolidant for use on exterior above-grade calcareous stone such as limestone and marble, brick masonry and natural stones. Penetrates the surface and bonds chemically to the substrate, resulting in permanent attachment of the water repellent molecule. Protectosil® CHEM-TRETE® 40 D is not a coating and as a result will not change the surface appearance of the substrate.
Technical Data Sheet