Konverter transforms rust into a stable, black chemical compound and forms a film that protects all ferrous surfaces: gates, entrance doors, railings, gutters and anything made of iron. Spread the product with a brush directly on the rust, leave to dry for at least 12/24 hours than overpaint with any type of paint, even long after application. KONVERTER LIQUID is ready to use and yields about 15 sq.m per litre.