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.. Application. 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 appliedby 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.. Cleanup. 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. freezing.. Product shelf life is 1 year.. Product Specifications (.PDF). Call
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