This product is a clear liquid, easy to install car, spraying the surface to form a photocatalyst film surface, coating evenly, easy to various substrates. The product uses imported from Japan nanoscale titanium dioxide, nano-silver complex in the rare earth element-doped titanium dioxide, doped and unique to the international advanced technology, doped metal cation and anion part, photocatalytic performance is greatly improved, spectral response range raised to 600NM, that most visible light energy can be used.