Ram 306 is a multi-purpose, SBS polymer modified, polyester reinforced modified bitumen membrane with a ceramic granule surface. The polymer modification enhances this products elongation, elastic and flexibility properties. The high strength polyester reinforcement gives the composite membrane excellent tensile strength, toughness, puncture and tear resistance necessary to accommodate typical rooftop exposures. Ram 306 comes with black or white granule surfacing, both of which offer resistance to ultraviolet rays and damage caused by foot traffic. The light colored granules provide improved reflectivity.