ELASTOPHENE HR Sanded 2.2 is composed of a proprietary formulation of elastomeric styrene-butadiene styrene (SBS) polymer modified bitumen and is reinforced with high performance glass scrim. The topside and underside are surfaced with fine mineral aggregate to facilitate cold adhesive and hot asphalt applications. ELASTOPHENE HR (high resistance) Sanded 2.2 is a SBS-modified bitumen base ply for use in approved multi-ply membrane & flashing assemblies.