What is the glue used to laminate polyvynal buytal to glass?

To get a correct answer to this you need to get your spelling exactly correct. There is no such thing as "polyvynal buytal" -However there are two items very close in spelling, but very different in substance. They are Polyvinyl Butyral , which is actually a clear adhesive used to laminate auto glass, and there is Polyvinyl Butyl which is a sealant used in construction.