Highly flexible moisture-curing polyurethane adhesive, capable of bonding materials such as metals, expanded polystyrene, fiber cement, polyester, phenolic laminates, etc. Given its excellent bonding characteristics, PROTOPUR 502 ROSSO is widely used in the manufacture of caravan parts, continuous wall panels, cold rooms, and insulating walls. In all cases, at least one of the parts to be bonded must contribute water to the adhesive line.