Skip to product information
1 of 2

Cortec VpCI® 391 Water Based Temporary Coating

Cortec VpCI® 391 Water Based Temporary Coating

Regular price £452.71 GBP
Regular price Sale price £452.71 GBP
Limited Offer Call for quote

Low stock: 10 left

VpCI®-391 is a fast drying, water-based temporary coating that provides protection in harsh, outdoor, unsheltered applications.

Provides multi metal protection. Excellent UV resistance. Can be matched to some custom colours. Provides a non-tacky film. Use of VpCI®-391 on weld joints does not negatively impact weld geometry or mechanical properties of the weld. It can be used to keep surfaces corrosion-free prior to welding.


Surface Preparation - Substrate should be free of grease, oil, dirt, fingerprints, drawing compounds, rust inhibitors, or any other surface contamination that could affect adhesion. For structural steel applications, Cortec® recommends a minimum of a NACE #3/

SSPC-SP6 commercial blast clean. Consult Cortec® and/or test system adhesion prior to full scale application.

Note: Make sure dew point is more than 5°F (2°C) less than air temperature for application. Power agitate to a uniform consistency using a “squirrel cage” type mixer, hand-held machine drill mixer, or other equivalent method. VpCI®-391 can be applied
by spray, roll, brush, or dip.

Typical Equipment Setups

HVLP / Conventional Spray:

  • Tip .009”-.021” *dependent upon pressures and viscosity
  • Air Pressure 45-55 psi
  • Fluid Pressure 10 psi
  • Fluid hose should be 3/8” (0.95 cm) I.D. with a maximum length of 50 feet (15.2 m).Pot should always have dual regulation and be kept at same elevation as spray gun.

Air Assisted Airless / Airless

  • Tip .015”-.035” *dependent upon pressures and viscosity
  • Pressure 1800-2500 psi
  • Hose should be 3/8” (0.95 cm) I.D. minimum, but a ¼”
  • (0.64 cm) I.D. whip end section may be used for ease of application. A maximum length of 100 feet (30.5 m) is suggested.


Clean tools/equipment immediately after use with water when coating is still wet. When dry, use Butyl Cellusolve or MIBK.
Follow mfg’s safety recommendations when using any solvent.

Packaging & Storage

Packaging & Storage
VpCI®-391 is available in 5 gallon (19 litre) pails, 55 gallon (208 litre) metal drums, liquid totes, and bulk. Keep product from

Product shelf life is 1 year.

Product Specifications (.PDF)

View full details