I have been using this technology for 17 years and I have never pressure washed my house.
Self Cleaning NP Technology Organic Matter Oxidization Utilizing photo-catalytic TiO2 Nano Particles as the Catalyst. Based on the science, it is a great way to disinfect a surface as well as sanitize. Having these nano particles is an extra hedge against recontamination.
Simply mix the powder with water and you have a spray disinfectant ,that not only works immiediately, but continues to work if light is present.
The simple explanation is sunlight hits the TiO2 and it makes hydrogen peroxide. For you scientific types the explanation is below
Titanium Dioxide ( TiO2) while absorbing Ultra Violet Light (UV) in the presence of Water/Vapor Molecules (H2O) and Oxygen converts the H2O into Hydrogen Peroxide (H2O2) that will destroy Organic Compounds without destroying the TiO2, which itself remains unchanged. In essence with the addition of the TiO2 into the Reactive Cured Ceramic Surface Treatment, we have created a Permanent Oxidizing Generator that only needs UV Light to continue to work providing Oxygen and Water/Water Vapor comes in contact with the surface of the TiO2. Organic compounds are broken down into Carbon Dioxide and Water while the Nitrogen Oxides, which are emitted in the burning of fossil fuels and create smog when combined with volatile organic compounds, yield Nitrate Salts.
The first known patent describing these phenomena came out of NASA in 1972. Since that date there have been over 500 patents issued on this same subject but none of them have resulted in a user friendly product due to the above reasons. In laboratories around the world they have collectively proven the ability of this process to Oxidize Bacteria, Mold, Mildew, purify water, breakdown oil and for other general hygienic applications.
To date, this technology has not been economically commercialized for building materials applications for several reasons. First, up and until a few years ago, the producers of TiO2 were only able to make Micron and Macro size particles. It is only recently that very small or Nano size particles have been available. Key here is that each particle regardless of size can only create so much activity or catalytic effect, therefore if you could have 20 particles in the same area where you once had just one large particle you will now have 20 times more activity. Second, if you want this process to work at the interface and on the surface of the Surface Treatment/Coating, you needed to suspend these particles in an Inorganic Clear Coating that would not be destroyed by the process that will be destroying the Organic Matter. Third, you had to figure out how to make a coating that would bond to the substrate and allow Water/Water Vapor and Oxygen to come in contact with the TiO2.