The Cortec CorrVerter Rust Converter Primer is a fast drying, water-based one-coat system that converts rusted surfaces to a hydrophobic passive layer and helps prevent further rusting through the formulation of chelating agents and PVC resins. This product provides long-term corrosion protection by itself or by topcoating with the company's VpCI-398 for extended performance. Remove loose rust before applying. CorrVerter is dry to touch in two to three hours, and fully cures in three to seven days.