EPS (expanded polystyrene) is regularly used in commercial, industrial and residential applications as a key component in Exterior Insulation Finishing Systems (EIFS). The high thermal value, excellent moisture resistance, dense, easily textured, dimensionally stable, and resistance to physi¬cal and environmental abuse makes EPS the preferred exterior insulation used with exterior wall systems FMI-EPS is Salmon Bay’s supplier of Dryvit EPS Outsulation.