Description: Styrofoam extruded polystyrene insulation, with its unique rigid closed cell structure, is the most widely used extruded polystyrene foam insulation for residential, commercial and industrial purposes. Styrofoam LB significantly reduces energy loss through above ground walls and underground basement walls of new and existing buildings. It maintains structural and thermal integrity, and is able to withstand the rough handling that occurs at the building site. This foam insulation has been invented by The Dow Chemical Company.