Polyurethane Catalyst PMDETA in Sustainable Wood and Metal Coatings Abstract: Pentamethyldiethylenetriamine (PMDETA) is a tertiary amine catalyst widely used in polyurethane (PU) coatings due to its high catalytic activity, particularly in promoting the blowing (water-isocyanate reaction) and gelling (polyol-isocyanate reaction) reactions. This article delves into the application of PMDETA in sustainable wood and metal coatings,...