Rust-Oleum 247596 Magnetic Primer, Smooth, Liquid, 1 qt, Can

SPECIALTY MAGNETIC PRIMER is a dark gray basecoat designed to transform a simple surface to one that attracts magnets. Magnetic primer can be applied to wood, metal, masonry, drywall, plaster and can be top coated with any latex paint. Strong magnets with minimal weight adhere best when coated properly. It is safe to use near electronics.