Owens Corning PROPINK® insulating sheathing is a premium insulating panel used to construct the exterior walls of a home. It features a tough laminated skin on both sides of its rigid foam core that is extremely resistant to damage—ideal for new construction. Exterior walls made of PROPINK deliver considerably greater R-value than plywood, OSB or other non-insulation products. In fact, once fiber glass insulation is placed in the exterior wall stud cavities, the completed 2x4 wall can achieve a total value of up to R-20. PROPINK is designed to be used with either wood or metal studs and suits a variety of exterior finishes including vinyl, metal and aluminum sidings, masonry veneer and reinforced stucco.