DuraFlex® 190FR SBS is a fire-resistant, premium SBS (Styrene-Butadiene-Styrene) mop or cold adhesive applied membrane with a high reflective granule. Manufactured with a non-woven polyester mat and fiberglass strands for enhanced dimensional stability, high tear strength and puncture resistance. It is saturated and coated with high quality, asphaltic bitumen and SBS elastomers for a durable, flexible and easily maintainable membrane. Designed for use as a cap sheet in modified bitumen roof systems.