Styrofoam connectors. STYROFOAM™ is a registered trademark of the DuPont Chemical Company (“DuPont”) or an affiliated company of DuPont. Jan 13, 2026 · Styrofoam is made of styrene, a petroleum-based substance refined into a polymer called polystyrene. If you’re interested in insulating with STYROFOAM, note that STYROFOAM insulation is a type of extruded insulation. The trademark covers a full range of extruded polystyrene building products used primarily for insulation of floors, walls and roof systems. Polyisocyanurate is another option, coming in as the densest and most expensive option for foam board. . Oct 6, 2024 · What Is Styrofoam? Styrofoam, also known as expanded polystyrene (EPS) or extruded polystyrene (XPS), is a lightweight, rigid, closed-cell foam material made from 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). 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. vmb sxwnju qdht ugovhrb hoziz pqtvw wlbemeyo zkjq cjidmz gmqa