A uniquely formulated blend of proprietary resins that create a chemical bond on âdifficult to bondâ plastics allowing adhesion of repair fillers and coatings to these substrates. Adhesion Promoter prepares properly cleaned and/or repaired parts for the application of adhesives. fillers and topcoats. Adhesion Promoter is also used as an excellent âsealerâ for all Flexible and Semi-Rigid plastics including TPO…