A photocatalyst keeps the outward appearance of buildings clean for a long time. It also keeps indoors hygienic e.g. it has antibacterial, antiviral, and deodorization properties. As a result of strong oxidization power and ultra-hydrophilicity of the photocatalyst under sunshine or indoor lighting, the above effects appear. As chemicals or electricity are not required for cleaning or deodorization, the photocatalyst is a very ecological material. Shin-Etsu Photocatalyst Coating is very transparent, so, it doesn’t hurt the design of the object. Shin-Etsu Photocatalyst Coating contains no organic solvents or plastic ingredients, so it is very safe for workers.