Bayhydrol XP 2593/1 Polyurethane Bayer MaterialScience Polyurethane (PU) - Polyurethane dispersions (PUDs) Coatings >> Waterborne Wood & Furniture Coatings water Soluble in water Aliphatic, fatty acid-modified, anionic polyurethane dispersion. Binder for the formulation of water-reducible coatings and sealers for wood and wood materials. It is characterized by very good wet film transparency, high hardness and good black heel mark resistance. Aliphatic, fatty acid-modified, anionic polyurethane dispersion. Used in wood coatings. Possesses very good wet film transparency. Offers high hardness and good black heel mark resistance.