The purpose of Fertan Rust Converter is to provide you with all the benefits of shot blasting with no surface damage & no material loss. As there is no blasting the process is nuisance free & silent. You are able to observe & be sure that all the rust has been converted before applying opaque paint coats. Fertan is suitable for treating steel & iron surfaces, even if they have to be left for weeks or months prior to final painting. Rust is removed & prevented from re-forming for up to six months so delays in your painting schedule will not be a disaster. It can be over-coated with oil or water based paints, epoxy, lacquer, wax etc. It is a complex, patented tannic acid, water based non toxic product. It offers exceptional protection against rust despite being environmentally friendly. Isocyanates & high volatiles are not necessary so it doesn't contain them. Fertan converts loose rust to powder that can be rinsed away leaving a converted stable & inert surface. When kept in closed containers & reasonable conditions it has an unlimited shelf life. Application is simple & safe…. 1. Loosen surface rust using a brush, abrasives or pressure washer. 2. Apply FERTAN using a brush, roller or sponge & let it sit for about an hour. 3. Dampen the treated surface with water to maximize penetration. 4. Leave FERTAN to react with the surface for 24 hours at 68°F to 48 hours if lower for best results. 5. Remove the black powdery dust with a damp cloth & leave it to dry. 6. Paint the treated surface with paint within 6 months, for effective long-term results.