ELASTOPHENE SP 3.0 (sanded, polyolefin) is a SBS-modified bitumen base ply for use in approved multi-ply membrane and flashing assemblies. ELASTOPHENE SP 3.0 is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen and is reinforced with a high quality random glass fiber mat. The topside is surface with fine mineral aggregate and underside is surfaced with polyolefin burn off film to optimize heat welding.