EM9300 WB Polycarbonate Urethane is a non-yellowing, exterior-grade clear finish designed to provide exceptional adhesion to a wide array of natural and synthetic substrates and painted surfaces. Formulated as a final topcoat for high-end architectural woodwork, trim, doors, cabinetry and applications that require a hard yet flexible coating in high UV exposure environments. EM9300 is rated for exterior applications.