... S. (Expandable Poly Styrene) is a lightweight, rigid, plastic foam insulation material produced from solid particles of polystyrene. Expansion ... , for example packing materials, insulation, and foam drink cups. How do we classify EPS?High expansion:Medium grade: ... Sandwich panel, 3D panel, Brick insert, Insulated Concrete Foam (ICF)Plastic Foam Flotation: i.e.: FloatDecorating Material: i.e.: Cornices, ...