DESMOPHEN 651 MPA/X is a branched hydroxyl-bearing polyester co-reactant, usually for Desmodur® N 75, in the formulation of lightfast and weather-stable two-component coatings. As a co-reactant in coatings, DESMOPHEN 651 MPA/X helps formulate durable coatings with excellent lightfastness, gloss retention and weather stability. It also improves the resistance of coatings to chemicals and abrasion, providing long-lasting protection for buildings and infrastructure. DESMOPHEN 651 MPA/X is soluble in common solvents for coatings and when combined with Desmodur® N 75, yields highly stable coatings suitable for both interior and exterior applications.