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Cosmoline Direct:

Rust Converter #7

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Ships UPS Ground (excluding HI & AK)
Product is made-to-order. 2-week lead-time.

COSMOLINE DIRECT'S RUST CONVERTER #7 - Fast, Super-Effective Rust Converter Formulation

Cosmoline Direct's RUST CONVERTER #7 is a water-based blend of penetrants, acrylic converters and proprietary acids specially formulated to neutralize and convert existing rust and to form a durable, black protective barrier against corrosion.  RUST CONVERTER #7 will serve as the primer coat for any type of coating suitable for the protection required for the metal surface.  RUST CONVERTER #7 is formulated for use in areas that cannot be easily sandblasted such as new construction repair, behind bulkheads, or thin easily damaged surfaces.  RUST CONVERTER #7 should not be used on critical use applications without testing to determine if the product will perform to needed standards.  The dry, porous coating that RUST CONVERTER #7 forms after converting the rust is not suitable as a long-term protective coating in and of itself.  For long term protection moving forward, it is recommended that a dedicated rust preventative top coat like Cosmoline 342, Cosmoline Black 344 or rust preventive paint be applied.


Surface to be treated should be free of grease, oil and loose particles and dirt.  RUST CONVERTER #7 can be sprayed, brushed or rolled onto exposed surfaces.  RUST CONVERTER #7 dries in 20-30 minutes.  Second application (if needed) can be made after 24 hours.  Application equipment can be cleaned with soap and water.  Estimated coverage is dependent on metal condition.  Coverage ranges from 300 to 500 square feet per gallon.


  • Appearance: Tan Opaque Emulsion
  • pH: 1.60
  • Specific Gravity: 1.118
  • Flash Point:  None
  • Shelf Life: 2 years (24 months)

Got a question about this product or want to discuss your application?  Please contact our EXPERT SUPPORT here.  We can help!


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Cosmoline® and Rust-Veto® are registered trade names of Houghton International