At the same time, all the dirt gathered on the outside of the window naturally decomposes. Rain, dust, wind — all this contributes to the intensive pollution of plastic windows. Many people know how much effort they have to make to make a calculation of the cost of the window. But today this is no longer required, if you install the Pilkington Activ system, you can look in more detail at the window. ru. After decomposition of organic dirt, it must be thoroughly washed off from the surface of the glass. This is carried out by draining water on the surface of the glass, which is provided using a hydrophilic coating.