ELASTOPHENE HR Sanded 3.0 is composed of a proprietary formulation of elastomeric styrene-butadiene styrene (SBS) polymer modified bitumen and is reinforced with high performance glass scrim. ELASTOPHENE HR Sanded 3.0 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.