Reaxis has developed a new water-soluble catalyst that has excellent hydrolytic stability and provides enhanced properties in 2K WB PU formulations under a variety of environmental conditions compared to typical polyurethane catalysts. The superior selectivity of C333 (compared to DBTDL) in promoting the reaction of isocyanate with hydroxyl groups versus water is a very important advantage over typical catalysts for the formulation of 2K WB PU coatings, as it contributes to prevention of foaming, which helps to optimize film appearance.