STYROFOAM™ HIGHLOAD Extruded Polystyrene Foam Insulation is a closed-cell foam insulation. All three STYROFOAM™ HIGHLOAD insulation products resist compressive creep and fatigue, delivering long-term compressive strength. Available in compressive strengths, STYROFOAM™ HIGHLOAD insulation features exceptional moisture resistance and R-value retention. Like all STYROFOAM™ insulation products, STYROFOAM™ HIGHLOAD 60 is durable, versatile and reusable - making them a preferred choice for a variety of high-load applications.