Styrofoam sculptures. Browse polystyrene foam blocks suitable for sculptures, models, and event displays. Foam board insulation can be used in many parts of your home to improve comfort and energy efficiency. Versatile crafting solutions available. Since its invention in 1941, Styrofoam™ Brand extruded polystyrene (XPS) has built a rich, storied heritage as an innovative, sustainable building product – creating an entire insulation material category. Styrofoam is a brand of closed-cell extruded polystyrene foam (XPS), manufactured to provide continuous building insulation board used in walls, roofs, and foundations as thermal insulation and as a water barrier. Jan 13, 2026 · Styrofoam is made of styrene, a petroleum-based substance refined into a polymer called polystyrene. Styrofoam is a brand of closed-cell extruded polystyrene foam (XPS), manufactured to provide continuous building insulation board used in walls, roofs, and foundations as thermal insulation and as a water barrier. Through an extrusion process, 98% air is introduced to the plastic, creating a lightweight, moisture-resistant, closed-cell foam known as Extruded Polystyrene (XPS). It works great for areas like garage, camper/rv/trailer, and exterior sheathing. Polyisocyanurate is another option, coming in as the densest and most expensive option for foam board. If you’re interested in insulating with STYROFOAM, note that STYROFOAM insulation is a type of extruded insulation. STYROFOAM™ is a registered trademark of the DuPont Chemical Company (“DuPont”) or an affiliated company of DuPont. com. . Jun 4, 2025 · Demystify Styrofoam! Our ultimate guide explains what Styrofoam (XPS) truly is, its key properties, how it differs from EPS foam, and its diverse uses, updated for June 2025. This structure gives Styrofoam its characteristic light weight, rigidity, and ability to insulate. Live better. Shop for Styrofoam Polystyrene at Walmart. The trademark covers a full range of extruded polystyrene building products used primarily for insulation of floors, walls and roof systems. Styrofoam is created through a process of expanding small polystyrene beads by adding heat, which causes the material to puff up and form a solid, closed-cell foam structure. Save money.