... Harden and brighten stone surface PERFORMANCE AND FEATURES: 1. The strain of the fourth-generation environmental conservation agent, no toxic effects, and ... , such as anti-stone discoloration, to the rust, back to the base, back to the sewage, albino, in water, easy frostbite ... (plate), red brick, in the paint at the end of the external walls, tiles.Note: 1. The construction of avoiding fire. Any ...