No. 3M Sun Control window films do not cause the glass to break. With the application of any film, it will increase the temperature of your sunlit glass that in turn will increase the stress on the glass edges. The quality of those glass edges and other factors such as external and/or interior shading, type of glass, type of film etc. all contribute to the potential risk of thermal glass breakage. Since 3M invented the world’s first window film in 1966 and holds the original patent, our experience of applying window films to glass around the world enables us to offer proper film/glass combinations to minimize the potential for thermal breakage. In addition, we support these recommendations with our 5 year thermal glass breakage warranty.