17 Insulating materials; Films, sheets and rods of plastics (in extruded form for use in manufacture); Foam board; Caulking and packing compounds; Extruded plastics (semi-finished products); Elastomer polymers; Semi-worked polymer resins; Polystyrene (semi finished); Polystyrene panels and sheets for insulation; Extruded polystyrene pellets; Extruded polystyrene pellets and polystyrene granules; Biodegradable polystyrene being semi-finished goods or being damping and insulating materials; Biodegradable polymer foam being semi-finished goods or being damping and insulating materials