When segmented by application, Expanded Polystyrene segmentation reveals four primary demand clusters. Packaging—including protective cushioning, food trays, and disposable containers—remains the largest driver, responsible for approximately 45 % of global consumption because of its lightweight, insulating, and recyclable nature. Construction applications, such as wall and roof insulation, void‑fill, and lightweight concrete forms, capture about 30 % of the market, reflecting building‑code mandates for energy efficiency. Automotive uses EPS for interior panels, impact absorbers, and under‑body shields, contributing roughly 15 % as manufacturers pursue weight reduction and cost control. Finally, Consumer goods—ranging from toys to small appliances—represent the remaining 10 % of demand, sustained by the material’s versatility and low tooling costs. This application‑focused market taxonomy clarifies how each sector’s growth trajectory influences overall EPS market size.