Nano Glass is a hydrophobic, protective glass coating that can be used on glass windshields, building windows, shower enclosures and mirrors. Nano Glass is designed to repel water for 3+ years or up to ONE Million Wiper Wipes on glass windshields. This coating has been proven to last 10 years on building windows/showers. Clean and maintain Nano Glass coated surfaces with soap and water to keep the extreme hydrophobic properties viable.