Hammerite

Hammerite Rust Blocker is a universal and highly effective rust barrier on rust-free or stained rusty ferrous metal surfaces. It can also be applied directly to rust, which prevents further rusting. For smaller rust spots on galvanized surfaces, it can also be used. As a neutralizer of rusty spots, it also provides a very good bonding agent for further coatings and can be painted over with all commercial paints.