The Seaman Corporation / FiberTite® offer a self-adhered bitumen and SBS polymeric Class I Vapor Barrier under the Trade name VaporTite. VaporTite Vapor Barrier Roll is a self-adhered vapor barrier membrane for steel decks composed of SBS-modified bitumen adhesive on the bottom surface and a tri-laminated woven polyethylene on the top surface. A silicone release film covers the adhesive under the surface.