It depends on the number of the windows on a car, it takes between 3 to 5 hours
LLumar films constitute a wide family of protective, thin-film products that serve a variety of useful proposes. Most are intended for application to glass surfaces and are made from the highest quality, optically clear polyester films, treated, coated, and laminated in various ways through vacuum metallizing, sputtering coating, chemical dyeing or pigmentation. Special adhesives and scratch-resistant coatings make the films extremely durable and bond well to glass and other materials. Over 180 unique films are used for automotive, architectural, and residential applications to control the sun's heat, glare, and ultraviolet light, or provide color and patterned decoration. Others are used to make glass safer and more secure, or to invisibly protect auto paint from stone chips and abrasion.
In both automotive and architectural applications, LLumar solar films can reduce harmful ultraviolet rays by 96 to 99.9 percent, depending upon the specific film. Many films will additionally reduce glare by over 90% and reduce solar heat gain by 90%
Not really. While not quite as hard as glass, LLumar films are extremely scratch-resistant and may be cleaned with common household cleaners, non-abrasive paper towels, or cotton cleaning cloths. Caution should be exercised to prevent extreme gouging by hard, sharp, metallic objects
LLumar films must be installed by a professional installer using highly specialized equipment and techniques.
Since an SPF 15 allows you to stay in the sun without burning fifteen times longer than you could if you didn't use any sunscreen, the calculation of the SPF for window film is fairly easy. The number is very large indeed. If the film product allows less than 1% UV transmission, the SPF would be about 100 or more. With 1.5% UV transmission, the SPF is 66.66. With a UV transmission of 2%, the SPF would be 50, etc. Simply divide 100 by the percentage of UV transmission. Make sure that your UV transmission number covers the whole range of UVA and UVB radiation. NOTICE: While this computation is easy to perform, it must be said that most dermatologists don't think numbers larger than about 20 are meaningful. Moreover, these SPF numbers are officially determined by actual skin testing according to an established experimental protocol. It is not permissible to make such claims about actual SPF numbers without having these skin tests performed by a qualified laboratory