Styrene Monomer - AS by Americas Styrenics is a colorless liquid with sweet odor. Used in cars & trucks, films, packaging, synthetic rubber, medical equipment and grouts. Also used in the production of expandable polystyrene (EPS), styrene butadiene latex (SBL), acrylonitrile-butadiene- styrene/terpolymer (ABS), unsaturated polyester resins (UPR), and styrene-butadiene rubber (SBR).