As a result of its prepolymers, Henkel’s Purmelt products are moisture curing. These PU hotmelts are used today in a broad range of graphic arts industry applications. This new generation of adhesives is distinguished particularly by its tremendous adhesion to a multitude of different paper types and various other materials. After reaction, the Purmelt film displays high flexibility at both high and low temperatures.

Purmelt has already made inroads into the hard cover sector as well. Even after final curing, the book spine permanently retains the desired rounded shape thanks to Purmelt's physical properties.