Characterization: Aliphatic polyisocyanate (flexibilizing HDI trimer). As the hardener component for lightfast polyurethane coating systems. Properties / Applications: Desmodur® N 3800 is used primarily as a hardener component for lightfast, two-component polyurethane coating systems with high chemical resistance and weather stability, very good gloss retention and outstanding mechanical properties. Preferred combination partners are polyacrylate or polyester polyols. The primary field of application for coating systems based on Desmodur® N 3800 are air and heat-drying automotive OEM, automotive refinishing and transportation coatings, as well as industrial coatings and coatings for plastics. Information provided by Covestro |