LG G4 Temper Glass Screen Guard - New Premium Ultra Thin HD Clear Tempered Glass Shield Screen Protector (Temper Glass) 1.Whole Transparency he tempered Glass is 0.4mm thick and made with high quality chemically treated transparent tempered glass. Break protection and shock resistance. The tempered glass has an oleophobic coating that prevents fingerprints and other contaminants and makes the film easy to clean. The tempered glass is coated on the back with a strong silicone adhesive that makes installation easy and attaches the film firmly so as to not affect the touch screen's sensitivity. If broken, the tempered glass breaks into small pieces that are not sharp, making it safer than other glass products.