Sherwin-Williams Kem Bond HS Universal Alkyd Metal Primer in Gray, 1 Gallon. This high-solids, rust-inhibitive alkyd primer is designed for use over iron and steel substrates. It provides excellent adhesion and serves as a heavy-duty protective coating for marine and industrial environments. Part number B50 AZ 8 / 6403-44966. The exterior of the can shows significant surface rust and wear from storage, but the container remains sealed. Ideal for industrial maintenance and metal refinishing projects.