An adhesion promoter or primer is most commonly a resin system in a solvent-based carrier and is used to alter the surface characteristics of a substrate prior to tape application. This surface alteration enhances, or in some instances creates a modified surface for bonding with a particular pressure sensitive adhesive. Adhesion promoters are most often used to raise the substrate surface energy of low surface energy plastics such as TPO, PP, PPO, PC, ABS and other plastic blends/alloys, allowing for increased short and long-term adhesion levels of 3M acrylic foam tape adhesives.
