3M™ 4298 Adhesion Promoter Primer 3M™ The 3M™ 4298 adhesion promoter primer is designed to significantly enhance adhesive bonding on challenging surfaces such as plastics, painted substrates, and selected metals, ensuring consistent and long-lasting adhesion. Easy to apply, it improves the performance of industrial tapes and adhesives in applications including plastic part assembly, trim attachment, and bonding operations in automotive manufacturing, electronics, and general industrial environments. Learn more