How Shutter Renu Restores Exterior Window Shutters All things weather. This is due to a number of factors including ultra violet light, rain, pollution and other localized environmental factors.
UV AND MOISTURE DEGRADE OUTDOOR VINYL SHUTTERS As vinyl siding and shutters are exposed to moisture and UV light they begin to break down. This process is called oxidation. The material that holds the pigments (including titanium dioxide) begins to microscopically degrade. In some siding or shutters the pigments may also begin to degrade. These reactions produce fading. Most people will clean their vinyl siding or clean their shutters every year or two to remove the chalky appearance. The siding looks clean but much of the color is lost. Many people will notice that when their siding gets wet, it looks richer in color. That is because water gives the illusion that the color has been restored.
MICROSCOPIC CRACKS DISAPPEAR RESTORING AND CLEANING VINYL SIDING AND VINYL SHUTTERS Vinyl Renu™ Professional Grade Cleaner Concentrate is designed to clean the vinyl siding and clean the shutters of the oxidation, mold, mildew, algae, bug spray, etc. This prepares the surface for Vinyl Renu™ and Shutter Renu™. Both products use a proprietary reaction process to restore the surface color. This restoration is done on a microscopic level. Neither product contains pigments or colorants to achieve this step. Vinyl Renu and Shutter Renu penetrate those microscopic cracks and restore the level surface so that the color is restored. In addition, both products contain the latest high-end technology to protect the surface from UV rays and most biological growth for years.
Source: http://shutterrenu.com/faded-vinyl-shutter-restoration/how-it-works/