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Cortec CorrVerter® MCI® Rust Primer

Cortec CorrVerter® MCI® Rust Primer

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CorrVerter® Migrating Corrosion Inhibitors (MCI)® Rust Primer can combat rust. It provides unparalleled corrosion protection for metal surfaces.

This primer has rapid-drying properties. It can swiftly remove rusted surfaces upon application and safeguard metals against corrosion.

This rust primer is also perfect for steel surfaces that already have some signs of corrosion or are not prepared properly for exposure to elements. It can reach even hard to reach affected areas. MCI® Rust Primer can neutralise and eliminate rust while forming a protective shield to prevent future rust formation.

CorrVerter® Migrating Corrosion Inhibitors (MCI)® is the go-to choice. Its cutting-edge technology and versatile application options make it a reliable ally in the fight against rust and corrosion, guaranteeing the preservation and durability of your valuable assets. Say goodbye to rust-related headaches and embrace the advanced protection offered by CorrVerter® MCI® Rust Primer today.

Mechanism Explained

CorrVerter Rust Primer contains three important characteristics:

  • Chelating agents
  • Waterborne latex
  • Water-vapour blocker

When these three combine, the primer creates a chemical reaction and binds the rust. It then converts the rust into a hydrophobic passive layer. The result is a new layer of protective barrier at the same time a prevention layer from the reoccurrence of rust.


The rust primer offers a multitude of advantages that set it apart as the top choice for engineers, contractors, owners, and packaging manufacturers:
Enhanced Bond Strength
Metals, especially rebar coated with CorrVerter® MCI® can bond strongly to concrete materials. It guarantees reliable structural integrity in construction and repair projects.

Speedy Rust Conversion

This rust primer acts swiftly in rust conversion. Thus, it minimises downtime and maximises efficiency during surface preparation.

Versatility in Application

You can apply this innovative primer under various weather conditions. It provides flexibility and convenience during application, even in challenging environmental situations.

Compatibility with Topcoats

MCI® Rust Primer is compatible with both solvent-based and water-based topcoats. Thus, it offers a wider range of finishing options. Compared to phosphoric acid & tannic converters that are compatible only with solvent-based topcoats, CorrVerter® MCI® provides greater flexibility and convenience in choosing the right topcoat for the project.

Unmatched Re-Rusting Protection

CorrVerter® Rust Primer stands out with its superior protection against re-rusting. The hydrophobic passive layer ensures long-term durability, even in harsh environments with exposure to HCl, H2S, SO2, and CO2 vapors.

Environmentally Friendly

CorrVerter rust primer is a water-based solution. So, it is not flammable, prioritizing safety during application and storage.


The recommended coverage for CorrVerter® MCI® is a single coat at 110-185 square feet per gallon (2.7-4.5 square meters per liter). In the case of severely corroded surfaces, it is advised to apply two coats, with the second coat following the first one within 20-30 minutes.

Surface Preparation and Application

First, remove loose rust with a wire brush. Wash with water to remove the excess salt contamination and dust.

To apply rust primer to a metal surface, use a brush for better penetration into the rusty steel. Coat the metal surface with a dry film thickness (DFT) of 3-5 mils (75-125 microns). For rebar steel, avoid over-spraying to ensure the adhesion of concrete during mortar repair.


  • To ensure prolonged outdoor protection, always add another layer of MCI® Rust Primer.
  • Application of primer should be done when the temperature is between 55 °F (12.8°C) to 100 °F (38 °C).
  • Allow at least 12 hours of curing before covering the rebar with concrete mortar to ensure optimal results.

The varying levels of darkening are indications of the severity of corrosion or rust on metals. Although a certain darkening could be incomplete corrosion, the primer will still do its work and convert rust no matter what.


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