How Window Films Work
Before describing how window films work, we must first understand how windows transfer heat from the sun. Regular, untreated glass reflects a small amount of heat, with the bulk of it being transmitted through the glass and onto surfaces exposed to sunlight, and the negligible remainder being absorbed by the glass. Window films work by reflecting, or rejecting most and absorbing a small portion of, the infrared (IR/heat) and ultraviolet (UV) wavelengths that clear glass lets through. This is done without affecting the visible part of the light spectrum to keep interiors bright. How this happens can be found inside the films themselves.
Among the many layers that window films are made of, a strong polyester laminate containing insulation coating layers is responsible for the performance of SunBloc window films. Cheaper films tend to use quick-fading dyes, or coloring, as a heat-rejecting layer. Most solar control films, on the other hand, use metallization to reject heat, degrading cellular signals in the process. SunBloc window films are constructed with superior Nano-ceramics to insulate interiors while preserving cellular and Wi-Fi signals.