Coating composition having photocatalytic activity

The invention relates to a use of the wall coating, semblance composition. The composition of the invention comprises at least one binder, wherein the 380 to the range nm, preferably of 400 to 450nm at least one absorption wavelength range is less than 0.8, and is less than 0.5 absorbing ratio (Kubelka-Munk the step (F) R∞), and at least one photo-catalysis active substance, wherein, in the absorption wavelength greater than 0.005, preferably of greater than 0.01, wherein the preferred is greater than 0.02 or the absorption of (Kubelka-Munk functional (F) R∞). Blends in the preparation of a use of the methods and compositions.