Saflex™ is a plasticised polyvinyl butyral (PVB) film that bonds with glass under heat and pressure to form laminated safety glass. The Saflex™ interlayer sandwiched between the layers of glass is responsible for the enhanced performance properties of laminated glass. It is sold as refrigerated or interleaved rolls and is manufactured in a variety of formulations, colors, and thicknesses for use in laminated architectural, transportation and specialty glazings.