Polyurethane, as a finish, is known for its clarity and sheen. Behlen's Polyurethane Finish is the top-of-the-line. It is recommended wherever a clear, hard abrasion and chemical resistant finish is needed. Their special formulation is developed for brush applications, dries in 2-4 hours and can be recoated after 4-6 hours of drying time. This makes a quick but very effective protective finish. Polyurethane works best on well-sanded surfaces for the smoothest and cleanest possible look.