Siloxane photocatalytic paint for exterior, impermeable to water, which prevents deterioration of the facades because it favors the removal of polluting agents in the atmosphere. Titanium dioxide particles, in the presence of light and oxygen, are activated by decomposing bacteria, micro-organisms and atmospheric pollutants, ensuring a self-cleaning and anti-pollution action, thus preventing the formation of mould and algae. This product can be tinted with the AC16 tinting system.