When compared to traditional wood boards, PU foam is lighter, easier to shape, and enhances performance. According to the American Chemistry Council, “polyurethanes are formed by reacting a polyol (an alcohol with more than two reactive hydroxyl groups per molecule) with a diisocyanate or a polymeric isocyanate in the presence of suitable catalysts and additives.” PU/PE are built using a polyurethane foam blank and then glassing it with a polyester resin. A particular draw of using PU foam is that it is closed cell—meaning it won’t easily soak up resin or water (should you ding your board), which helps keep the board light.