Corroseal Water-Based Rust Converter Metal Primer, 1 Qt — Converts Rust to Stable Black, Paint-Ready

When rust appears on steel or iron, Corroseal 82320 offers a one-step alternative to aggressive mechanical removal. Instead of sanding or sandblasting to bare metal, this water-based formula converts active rust into a more stable compound and lays down a paintable latex primer layer. It’s designed for marine, automotive, household and industrial uses and cleans up with soap and water because it’s non-flammable and non-corrosive.

How does Corroseal treat rust without sanding?

Corroseal’s chemistry reacts with iron oxide to transform flaky rust into magnetite, a dense black substance that adheres to the surface. That conversion stabilizes rust and prevents further rapid deterioration while providing a primed surface ready for topcoat application.

• Converts iron oxide (rust) into magnetite, not simply covering it
• Leaves a black, stable coating that bonds to original metal
• Reduces need for heavy mechanical removal such as sandblasting

Can I paint over Corroseal and what surface prep is required?

Yes—Corroseal both converts rust and deposits a latex metal primer, so most topcoats adhere directly after the product dries and cures. Light surface cleaning to remove grease, loose scale and salt is recommended; heavy, loose rust can be brushed away first for better contact.

• Clean with soap and water to remove oils and contaminants
• Remove loose scale or flaking rust with a brush before application
• After drying, prime is paint-ready for most latex or oil-based topcoats

What are the application details and coverage I should expect?

Apply Corroseal with a brush, roller or spray at a wet film thickness of roughly 8–10 mils for best results. Coverage varies with surface texture, but plan on about 200–250 square feet per U.S. gallon when applied at recommended thickness.

• Apply at 8–10 mils wet film thickness for effective conversion
• Coverage: approximately 200–250 sq ft per gallon under typical conditions
• Easy application options: brush, roll, or spray depending on project size

Is Corroseal safe to use and how is cleanup handled?

Corroseal 82320 is formulated as a non-flammable, non-corrosive, water-based product, making handling and storage simpler than solvent-based alternatives. Clean brushes and tools with soap and water immediately after use; follow safety labels for ventilation and protective gear.

• Water-based formula; cleans up with soap and water
• Non-flammable and non-corrosive for easier handling and storage
• Follow label instructions for ventilation and protective equipment

Who this is for: Corroseal 82320 is intended for boat owners, auto restorers, property maintenance crews, fabricators and DIYers who want an efficient way to stop active rust and prepare metal for painting without aggressive mechanical stripping. It’s particularly useful when time, cost, or access make sandblasting impractical and when a water-based, easier-to-handle product is preferred.