SOPRALENE 180 Sanded 2.2 is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene polymer modified bitumen and is reinforced with a tough, dimensionally stable non-woven polyester mat. SOPRALENE 180 Sanded 2.2 is a SBS-modified bitumen base ply for use in approved multi-ply membrane & flashing assemblies. The topside and underside are surfaced with fine mineral aggregate to facilitate cold adhesive and hot asphalt applications.