425g Bulldog® Adhesion Promoter is designed to promote paint adhesion to all automotive surfaces, even problem plastics. It works equally well on all flexible or rigid plastics, fiberglass, aluminum, glass, chrome, vinyl, galvanized metal, and painted surfaces. Bulldog acts as a tie coat by allowing several different surfaces to be painted at the same time to assure a smooth, flawless, durable finish every time. If added to the paint, it will perform as a flex agent, promoting more flexibility on plastics.