JAYSUING Water-Based Metal Rust Remover Converter with Brush - Anti Rust Paint for Car Chassis, Industrial Use - Universal Rust Removal Chassis Rust Converter, Long Lasting Deruster Water-Based Metallic Paint, Anti-Rust Primer Metal Surface Rust Remover

Automotive rust proofing primers work by chemically converting existing iron oxide (rust) into a stable, black, protective polymer barrier, which prevents future corrosion and provides a paintable surface. They are an efficient, long-lasting solution, particularly for hard-to-reach areas where manual rust removal is difficult. 

How They Work

Rust converter primers use a two-part process involving chemical and physical changes to stabilize metal surfaces. 

• Chemical Conversion: Active ingredients, usually tannic acid or phosphoric acid, react with the reddish-brown iron oxide (rust) and transform it into a stable, inert black substance like iron tannate or iron phosphate. This process neutralizes the existing corrosion.
• Protective Barrier: An accompanying organic polymer or epoxy resin in the formula then forms a durable, non-porous film over the converted rust. This barrier seals the metal from moisture and oxygen, which are necessary for new rust to form, offering long-term protection. 

Key Benefits

• Hassle-Free Application: These primers reduce labor by eliminating the need for intensive sanding or sandblasting down to bare metal; only loose rust needs to be removed with a wire brush or sandpaper.
• Long-Lasting Protection: The converted layer, when top-coated with an oil-based paint, resists weather, salt spray, and chemicals, ensuring the finish lasts for months or longer without peeling or cracking.
• Versatile Use: The product is suitable for a wide range of ferrous metal objects, including car chassis, garbage cans, railings, chains, and various home and garden items.
• Acts as a Primer: The resulting black coating provides an excellent base for a topcoat of paint, improving adhesion and durability of the final finish. 

Application Tips

For the best and longest-lasting results, proper application is crucial. 

1. Surface Preparation: Remove any loose rust, dirt, grease, or flaking paint with a wire brush or sandpaper. The remaining tight rust is necessary for the chemical reaction to occur.
2. Application: Apply in a thin, even layer using a brush, roller, or spray gun. A second coat can be applied to heavily corroded areas after the first has dried.
3. Drying and Curing: The product typically dries to the touch in 20-40 minutes, but often requires a full 24-48 hours to cure before applying a topcoat.
4. Topcoat: A high-quality oil-based or epoxy topcoat is recommended for maximum durability and UV resistance, as many rust converters are not UV stable on their own.