External films are are of weather resistant construction having additional UV barriers to help protect the film from degrading through exposure to sunshine, and also having a strong waterproof adhesive. They are particularly used when inside access is not always possible or depending on the type of glass, in particular laminated, Georgian-wired, heavy tinted glass or some double or tripled glazing.
Opalux® Reflective Silver 35 solar control film offers maximum heat rejection for internally applied films, and is of particular use in combating severe solar heat gains and glare problems. It can also provide additional benefits such as uniform outside appearance, winter heating savings, and as with most Opalux films up to 99% ultraviolet light (UV) filtering. (For specialist UV filtering in museums etc, see Specialist UV Control Film).
It also helps to alleviate the discomfort caused by excessive heat and by glaring reflections off computer screens, assisting in compliance with the Workplace (Health, Safety and Welfare) Regulations.
The film is applied externally and, in daytime, lends the glass a silver reflective outside appearance, whilst from the inside, the visual effect, much less noticeable, is a light tint.