Primers are an important step in the adhesive application process, creating a properly prepared surface to ensure a successful bond. They are particularily useful on difficult-to-bond substrates like polypropylene and polyethylene. Aside from preparing the surface, adhesive primers can also improve bond strength, surface wettability, and prevent damage to the component. Ellsworth Adhesives offers primers from manufacturers like Dow, Socomore, Henkel Loctite, Sika, Parker LORD, 3M, and more with aerosol and non-aerosol formulations.