If your project requires you to source Styrofoam beads for sale, then you probably need polystyrene beads; it’s a common mistake to confuse the two. As well as being the key material to make EPS blocks and sheets, polystyrene beads can be used in their own right in the manufacture of items such as the popular bean bag chairs. Their other major application for polystyrene beads is in the production of concrete, to strike the right balance between weight and strength. The more polystyrene beads added, the lighter the concrete for specific construction applications