Elastoflex S6 is a smooth surface Styrene-Butadiene-Styrene (SBS) modified bitumen roofing membrane reinforced with a polyester mat saturated with a rubberized asphaltic compound. The non-woven reinforcement provides superior tear strength and puncture resistance. Elastoflex S6 is designed for use as a base ply or interply layer in multi-layer low-slope assemblies. Membrane is available in a film or sand top surface and a film or sand bottom surface.