SOPRASTAR Stick is a SBS-modified bitumen cap ply for use in approved multi-ply membrane and flashing assemblies. SOPRASTAR Stick is composed of a proprietary formulation of elastomeric styrene-butadiene-styrene (SBS) polymer modified bitumen and is reinforced with a tough, dimensionally stable composite polyester/glass fiber reinforcement. The topside is surfaced with a highly reflective white film and underside is surfaced with a protective polyolefin release film that is removed during application.