DynaGlas® is an elastomeric, modified bitumen sheet incorporating the features of a strong fiber glass mat with a blend of SBS rubber and high quality asphalt. The covering layer of ceramic coated roofing granules, black or white, provides durability along with superior resistance to damage from weather and foot traffic. The inorganic fiber glass reinforcement provides high tensile strength, stability and toughness to the product and resists moisture absorption. These properties also afford the product better natural resistance to the other factors which affect roof performance.