Can window film make glass become a one-way mirror?
It is possible, under certain conditions, to make regular glass appear as though it is a one way mirror. With the application of reflective film, in conjunction with proper light levels, glass can be seen through from one direction and give the appearance of a mirror from the other direction.
The effective life of window tint will vary by the type of film, type of glass, window construction, compass orientation of glass, and in which part of the world. There are documented cases of film lasting 12-18 years or more in some instances. Vista is a quality window film for residential and commercial use and is warranted by CP Films for a minimum of 10 years, and in residential settings, for the lifetime of that glass.
New window film has about a 30 day curing time, in which it is recommended to NOT wash it. After that curing period, you may clean your filmed glass the way you wash unfilmed glass. You can use Windex, GlassPlus, or any ammonia-based product. You must use a SOFT cloth or paper towel, or a rubber squeegee. You CANNOT use any abrasive materials or razor blades.