SMART-X® is a premium-quality distinctive lightweight foam board consisting of an all-plastic sheet that is uniquely constructed with a moisture-resistant expanded polystyrene core and two layers of UV-resistant solid polystyrene (HIPS). SMART-X® can be installed outdoors without experiencing any significant change in color for a period of up to two years. And, as a mono-material composite that is manufactured without adhesives applied between its core and facers, SMART-X® cannot delaminate during exterior applications.