ELASTOPHENE® PS 2.2 is an SBS-modified bitumen base ply for use in approved multi-ply membrane and flashing assemblies. ELASTOPHENE PS 2.2 is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen and is reinforced with high quality random glass fiber mat. The topside is surfaced with polyolefin burn-off film and the underside is surfaced with fine mineral aggregate to facilitate cold adhesive and hot asphalt applications.