How it Works
The self-cleaning property of SunClean glass is made possible by a durable, transparent coating of titanium dioxide (TiO2) applied during the manufacturing process. The application process, patented by PPG, makes the coating an integral part of the outer glass surface, providing homeowners with a durable, long-lasting product.
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In a photocatalytic process, ultraviolet (UV) light from the sun energizes the SunClean self-cleaning glass to help slowly break down and loosen organic dirt. Since UV light is abundant even on cloudy days or in shaded areas, this process works nonstop throughout the day.
The coating also has a hydrophilic property that makes water droplets spread out, or sheet, across the surface of the glass. When rain or a light spray of water hits the window, the water carries away the loosened dirt. This sheeting action also helps the window dry quickly with minimal spotting or streaking.
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Our leadership in coating technology over the past 30 years combined with glassmaking experience that spans more than a century, has provided tremendous consumer benefits to homeowners and the residential construction industry. Tempered glass improves safety, while UltraShield glass helps homeowners stay warmer in winter, cooler in the summer resulting in 40% lower energy costs. Now, SunClean glass is available and is designed to make homeowners' lives easier. 
