Waterbased aliphatic blocked polyisocyanate.Baybond® XL 3674 is suitable for use as a crosslinker for glassfiber sizings.In combination with Bayhydrol® polyols Baybond® XL 3674 can be used for the formulation of water-reducible, lightfast one-component polyurethane baking coatings and as an additive in waterborne baking systems to improve flexibility, impact strength and adhesion.