For example extruded PVC, contain a substance, that will migrate to the surface of the substrate over time. Extruded PVC substrates also pick up some lubricants that are used in the extruder. Because of the before mentioned reasons, the substrates should be primered ere it gets wrapped. The primer can be applicated with felt pads (non flammable primer !) or by using the new primer application system (aqueous primer). PrimeStar 2010 to apply primer is an innovation by düspohl. For more than 25 years there was no genuine innovation in the area of primer application on plastics and metals. In order to ensure a optimal adhesion the tension of the surface, which should to be wrapped is changed and the surface is cleaned by the primer.
Substrates can arrode after the wrapping process. The corrosion can destroy the glue line, which leads to the fact, that the gluing and/or the overlay material becomes detached. To avoid corrosion, you can use a treated metal for wrapping (painted, powder coated, chromed, … ). An other solution, in case you work with raw and degreased metals, is the application of primer or the combination of a treatment in the plasma or corona method and primer.