BRM Nano-Premiumglass is a modern, very strong nanotechnology waterproofing and protective for glass surfaces. It waterproofs the glass  and makes it hydrophobic and resistant to a variety of contaminants. Eg Salts in showers and mirrors, bird droppings and resin on vehicle windshields are easily cleaned with a little water. After its application, the glass surfaces get dirtier and easier to clean without the need for detergents. The duration of protection reaches up to 8 years with one pass! It is combined with the pre-cleaner Preclean. Read the instructions for use.