vci coatings technical data



MIL-DTL-24441/20A (SH)






This epoxy-polyamide, two component, lead and chromate free primer coating is designed to conform the specific composition and performance requirement of Federal Specification MILDTL-24441/20A (SH) Formula- I 50, Type-III, and is recommended to be used for painting land and marine structures. VCI Coatings vapor phase corrosion inhibitor (VCI) is added to Part A in an amount that when combined with Part B the applied dry film solids will contain 2.5 Wt. % of VCI solids.


  • Excellent rust preventative properties in adverse or chemically polluted atmospheres.
  • Corrosion inhibiting properties are increased by a factor of 5 to 10 times due to addition of the VCI agent that will migrate through a rusty surface and inhibit further steel surface corrosion.'
  • Will inhibit corrosion of both fresh and salt corroded steel surfaces.
  • Easy application by brush and airless spray.
  • Good adhesion properties on white steel when surface is abraded and on rusty steel surface due to corrosion texture and achieve adhesion rating of 5B per ASTM B 117.
  • Excellent water and weather resistance for interior and exterior use.
  • Resistance to spill/splash of mild chemicals.


Color and Finish

Gray, Flat

Mass Density

~11.25 lbs. / gal

Solids by Volume

63 +/- 1%

VOC (Before Thinning)

2.80 lbs. / gal or 340 gr / liter

Theoretical Spreading Rate @1 Mil DFT

~1000 sq. ft. / gal

Recommended Dry Film Thickness

3-4 Mils (75-100 Microns)

Touch Dry (25° C / 77°F)

2-3 Hours

Dry Hard (25° C / 77°F)

6-8 Hours

Min. Interval Before Overcoating (77°F)

8 Hrs at 3-4 Mils DFT

Max. Interval Before Overcoating (77°F)

7 Days

Full Cure After

7 Days

Temperature Resistance (Dry)

250°F / 121°C

Flash Point (TCC)

Base 99°F / (38°C)

Hardener 108 F / 42°C


This product is a two component material with Part A (base plus VCI-Coating Agent 12) and curing agent (Part B) normally supplied in 1 gallon cans. A sample kits is available in 2 one quart containers containing one pint each of A and B. Prepare for use by combining the 2 containers and thoroughly mixing.




Steel: Blast cleaned to a minimum grade SSPC- SSP10. The surface must be perfectly dry before application.

Corroded Steel: Clean and degrease surface to remove surface contaminants such as oils, soils, loose paint and flakey rust by pressure washing or mechanical means. Soundly adhered surface rust can be over-coated with this product.




Power agitate base component to uniform consistency before combining

then again after combining. Do Not vary proportions.




During application and the first 24 hours of curing, the substrate

temperature must be above 41°F (5°C) and at least 5°F ( 3°C) above the dew point.




Ratio: Base to hardener 54-46 by weight

Base to hardener 50-50 by volume


The temperature of the mixture of base and hardener during mixing and application should be above 59 °f (15°C), otherwise more solvents must be used to obtain application viscosity. This results in lower sag resistance and slower cure. Thinner should be added after mixing the components.

Very good mechanical mixing of base and hardener is essential in view of the paste consistency.




5 Hours at 73°F (23°C)




Conventional Spray Model Air Cap

DeVilbiss MBC or JGA 704E

Binks #18 or #62 66PE

Fluid hose should be 3/8" I.D. with a maximum length of 50 feet. Pot should always have dual regulation

and be kept at the same elevation as spray gun.


Airless Spray Model Pump

DeVilbiss JGN-501 QFA-519

Binks Model 500 Mercury 5C

Graco 205-590 Bulldog

Hose should be 3/8" I.D. minimum, but whip end section may be used for ease of application. A maximum length of 100 feet is suggested. Best results will be obtained using a .018" - .021" tip at 2400 to 2700 p.s.i.





Airless Spray: Thinner O to 10% by Volume

Conventional Spray: 5 to 15% by Volume

Roller and Brush: 0 to 5% by Volume

Clean Up: MIL-24441 Thinner




Contains Flammable Solvents. Keep away from sparks and open flames. Use only grounded explosion proof equipment in accordance with the National Electric Code. Workmen must use nonferrous tools; wear non-conductive and non-sparking shoes in areas where explosion hazards exits. In confined areas, workmen must wear fresh airline respirators, protective clothing and gloves. Avoid contact with skin, breathing of vapor or spray mist ingestion. Keep out of reach of children.




The technical data listed herein has been compiled for your convenience and guidance, and is based upon our experience and knowledge. However, since we have no control over the use of this information or of this product, no warranty, expressed or implied, is intended or given. VCI COATINGS, LLC assumes no responsibility whatsoever for coverage, performance,or any other damages, including injuries resulting from use of this information or of products recommended herein.


VCI Coatings Materials applied in accordance with Specification.

VCI Coatings™ - patent pending.