VpCI®-377/377 Winterized


VpCI-377 is a water-based concentrate designed as a complete replacement for oil-based preventives for indoor protection of equipment and components. VpCI-377 is a corrosion preventive liquid that meets tough antipollution requirements. The wide dilution range with water (0.5-20%)* allows flexibility to customize the length of protection required and the applied cost per square foot (or m2).

VpCI-377 forms a solution in water and is applied to metal surfaces by spraying or dipping. VpCI-377 does not need to be removed, but if necessary, can be removed with conventional alkaline cleaners, such as Cortec’s VpCI-410 series.

VpCI-377 is also available in a cold weather version. VpCI-377 Winterized has a lower freeing point for the convenience of application ansd storage in cold temperataures.

*Contact DEYAP Representative for dilution recomendations.



• Protects ferrous and non-ferrous metals
• Water-soluble, safe to apply
• Very stable in hard water
• Will not clog filtration systems
• Forms a clear, dry, hydrophobic film
• Easy to remove if necessary
• Nitrite and phosphate ester free
• Non-flammable
• Passes ASTM D-4627-86 (Test Method for Iron Chip Corrosion for Water-soluble Metalworking Fluids) at 2% by weight
• Excellent wetting properties
• No hazardous decomposition by-products
• Can be coated over with most conventional paint systems




Thin film coating for dry storage of:
• Castings, tubular parts, finished parts, gears
• Pumps and housings
• Textile and printing equipment
• Structural steel, sintered metals
• Bars and roll stock
• Additive to rinse water systems

Spraying or dipping on metal surfaces will provide indoor protection.


• Carbon steel
• Aluminum
• Stainless steel
• Copper
• Galvanized steel


Product Preparation:
Add VpCI®-377 to water and mix thoroughly. Spray, dip, or use in parts washers and rinse tanks. Solution concentration can be monitored by a refractometer, or pH





Appearance: Clear dark brown or black liquid

Film Type: Dry, clear

Non-volatile Content: 40-47%

pH: 7.5-9.5 (Neat)

Density: 8.7-9.2 lb/gal (1.04-1.10 kg/l)

(2.5% solution in water 28 days) 0.48

Corrosion Resistance: Up to 24 months indoors

VpCI®-377 Winterized

Appearance: Clear amber liquid

Film Type: Dry, clear

Non-volatile Content: 36-42%

pH: 7.8-8.9 (Neat)

Density: 8.8-9.2 lb/gal (1.05-1.10 kg/l)

Carrier: Water + Propylene glycol

Freeze point: -22°F (-30°C)

Corrosion Resistance: Up to 24 months indoors



VpCI®-377 is available in 5 gallon (19 liter) pails, 55 gallon (208 liter) drums, liquid totes, and bulk. The product should be stored sealed in a heated warehouse to avoid freezing.

VpCI®-377 Winterized is available in 5 gallon (19 liter) pails, 55 gallon (208 liter) drums, liquid totes, and bulk.

VpCI®-377 is also available in EcoAir® compressed air cans (12 oz. / 340 g) bottles.

Shelf life is 24 months


ASTM D1735 Water Fog Cabinet
ASTM D-1748 Humidity Cabinet
ASTM D-4627 Cast Iron Chip Test
ASTM G-31 Immersion Corrosion Testing
NACE RP0487-2000 Selection of Rust Preventitives