BYK-4513 is an adhesion promoter that increases wet and dry adhesion of metal substrates. It improves mechanical resilience and corrosion resistance of coatings. The polymeric character of BYK-4513 provides flexibility to the film coating when used. BYK-4513 is silane free and has outstanding storage stability. It is recommended for use in protective and industrial coatings systems especially where increased adhesion to metals, flexibility and corrosion resistance of the coating is important.