Durotex is a double-sided coated backing material, e.g. for processing in the Bielomatik Bookmaster. The Durotex has a hot-melt adhesive coating on one side and a heat-seal coating on the other. Both coatings of this roll material are largely block-resistant to each other up to 40°C, so that it can be wound without silicone backing paper.

The Durotex, which can be thermally activated on both sides, can also be used as a transfer adhesive film, which is characterized by very good dimensional stability compared to conventional films.

Thermo-activatable Durotex is processed with a heated tool. An activation temperature of 100°C and a surface pressure of 1 bar (=10 N/cm²) are sufficient to activate the hot-melt adhesive coating. An activation temperature of 120°C and a surface pressure of 3 bar (=30N/cm²) are required to activate the heat-seal coating.