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Rust Converter, Corrosion Preventative and Primer

3 in 1 Product

Corrosion Proofer

CPT-298 Rust Converter Primer

CPT-298 is a corrosion converting and corrosion preventing high build primer. CPT-298 is recommended for application to corroded or poorly prepared ferrous or non-ferrous surfaces where further corrosion prevention is required and good surface preparation is difficult to achieve. CPT-298 is formulated to migrate through rust, eliminate corrosion, penetrate to the bare metal and stop further corrosion. CPT-298 contains a migrational and penetrating molecule that modifies the surface rust into a hydrophobic passive layer. CPT-298 combines the above-mentioned technology with a high build moisture displacing resin with extremely low water vapor permeability. CPT-298 does not contain tannic or phosphoric acids or any heavy metals and is a low VOC and environmentally friendly formulation. Furthermore, it provides extensive long-term corrosion protection for poorly prepared substrates and prepares the surface and creates a profile suitable for a long-term top-coat.

  • CPT-298 converts corrosion and can be applied under varying weather conditions
  • Provides 1000 hours of corrosion protection with 3.5-mil application ASTM B 117
  • Works in the presence of excess salt contamination - perfect for marine applications
  • Provides excellent protection against corrosion and prevents re-rusting
  • Excellent bonding characteristics for top coats
  • VOC compliant and AQM D Compliant
  • Environmentally friendly, non-toxic
  • Non-flammable, non-combustible
  • Appearance: milky off-white viscous liquid
  • Total Solids, by weight: 55-58%
  • Total Solids, by volume: 40-42%
  • Density: 11 lb/gal (1.32 kg/l)
  • VOC: 0.56 lb/gal (0.07 kg/l)
  • Theoretical Spread Rate: 350-450 sq.ft/gal @ 1mil

CPT-298 is recommended for use on all steel surfaces as a rust converter high build primer. The product can be used in situations where proper cleaning or sandblasting is difficult. It is recommended that any loose rust be removed with a wire brush and the rusty steel surface washed with high-pressure water to remove excess salt contamination. Brush, roll or spray CPT-298 to 3-5 mils (75-125 microns) wet film thickness. Brush or roll application is preferred to ensure penetration into the rust. The coating can be applied to dry or damp surfaces. A second coat of CPT-298 should be applied within 20-30 minutes after the first application to ensure maximum protection. Allow to dry for 8-12 hours before applying a top coat.


  • Not UV stable and changes color in outside conditions. This does not change converting or protection properties and does not affect the topcoat or topcoat adhesion.
  • For proper application, the product should always be mixed thoroughly before use.
  • On certain types of rust, various degrees of darkening may be visible, and may even be incomplete under certain drying conditions. The degree of darkening does not affect the coating; the coating will continue to convert rust. Upon drying, the formulation will exhibit excellent base corrosion preventative performance.


CPT-298 is available in 5-gallon containers and 55-gallon drums.

Keep product from freezing. The shelf life of the coating is one year.


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