VACTAN RUST CONVERTER A superior product for the treatment of corroded steel and iron surfaces. Vactan neutralises the corrosion process by converting the rust into a blue black metallo-organic complex. Vactan is applied to rusted metal surfaces to stop rust, protect the surface and act as a primer before painting. Vactan is self priming and does not need a top coat, but for long term protection it is advisable to topcoat with solvent or water based pain