DynaGlas® FR features ceramic-coated roofing granules engineered for optimal embedment in the SBS-blend sheet. The ceramic coating promotes excellent long-term adhesion. The thicker JM SBS coating provides more waterproofing value. A fiber glass reinforcement mat offers excellent dimensional stability and tensile strength and withstands differential movement. An SBS rubber and asphalt blend lends elasticity and flexibility to the sheet and contains fire-retardant additives.