Expanded Polystyrene (EPS): Most common foam products like architectural shapes, large foam blocks, coolers, wine shippers, Geofoam, roofing insulation, molded end caps and corners, box packaging and even cups at the office water cooler are actually polystyrene foam. Expanded Polystyrene (EPS) is the generic industry name for the white rigid material made by expanding polystyrene beads with steam and pressure to bond the beads together to form blocks or to shape molds. EPS is also used in the construction industry for insulation and void fill. Geofoam typically refers to EPS that is molded in blocks and used as lightweight fill in building and road construction.
STYROFOAM™ Brand Foam for Construction: STYROFOAM is a registered trademark of the Dow Chemical Company (Dow) or an affiliated company of Dow. This trademark covers a full range of extruded polystyrene building products used primarily in construction for wall insulation, floor insulation, and roof insulation systems. These insulation panels are commonly referred to as blue board in the construction industry. Most often the word Styrofoam is generically used to describe expanded polystyrene foam products like disposable coffee cups, cooler and other foam packaging materials, none of which are actually STYROFOAM.