DuPont™ Styrofoam™ Brand Highload Extruded Polystyrene Insulation is a closed-cell foam insulation designed for use in heavyweight infrastructure and low-temperature applications where compressive strength and moisture resistance are crucial. The Styrofoam™ Brand XPS product line gives you the proven thermal and moisture performance of the original XPS, plus the product options you need to design and build energy-efficient, resilient structures all the way to the top. It’s lightweight and easy to install, which makes the work go faster, and it’s readily available through our wide distributor network. When and where you need it, Styrofoam™ Brand is there.