Ultraviolet (UV) light, from the sun, contributes to approximately 40% of the fading process, which can ruin furnishings long before their time.  Visible light and solar heat can contribute approximately 25% each. The remaining 10% can be attributed to miscellaneous effects such as indoor artificial lighting, humidity, heat and poor dye anchorage.

Clear single pane glass (1/8" to 1/4") will reject 23-28% of the ultraviolet light from the sun.  Insulated glass is slightly better, rejecting 36-41%.  Window films installed on glass reject 99% of solar ultraviolet light.Different types of clear glass and window systems will reject 13-29% of the solar heat.  With window films, 80% solar heat rejection can be obtained.

Solar control films contain ultraviolet absorbers which reduce the amount of ultraviolet radiation being transmitted through glass.  Both visible light and ultraviolet radiation are important causes affecting fading to floors, carpets, draperies and other furnishings for the home.

Fading is a complex issue because each and every material has a different propensity to degrade from exposure to ultraviolet radiation and other contributory factors.  For example, wood is extremely vulnerable to fading from sunlight.  It is generally accepted that UV radiation can be responsible for roughly 40%-60% of all fading.  Solar control window film products are not 
guaranteed to stop or cure a fading problem.  However, professional quality window film can significantly reduce fading caused by ultraviolet, visible light and solar energy.  The degree of protection you obtain is closely tied to the type of film you select.

No window film can eliminate fading.  It can however, offer maximum protection from fading due to solar ultraviolet light and solar heat.