Laminated glass is a type of safety glass that is made by sandwiching a layer of polyvinyl butyral (PVB) between two or more sheets of glass. The PVB layer holds the glass sheets together, even if the glass breaks, preventing it from shattering into sharp pieces that can cause injury. Laminated glass is commonly used in automobile windshields, skylights, and buildings to provide both safety and security. The PVB layer also helps to reduce noise transmission and provides additional insulation against heat and cold. It can also be made with tinted or reflective glass for privacy or to reduce glare.