What is EPS Panel in building and construction business? EPS Panel (Expanded Polystyrene Panel) is an extremely lightweight product that is made of expanded polystyrene beads. Originally discovered by Eduard Simon in 1839 in Germany by accident, EPS foam is more than 95% air and only about 5% plastic EPS or Styrofoam as people call it, is a type of polystyrene, it is produced from polystyrene beads, which when expanded and molded under controlled conditions form a light weight block.Read More …