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Cortec VpCI® 641 water-based rust preventive

Cortec VpCI® 641 water-based rust preventive

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Cortec VpCI 641 liquid serves as a water-based rust preventive additive designed to safeguard both ferrous and non-ferrous metals in industrial water environments.

Notably, it is non-toxic, environmentally friendly, and devoid of nitrite or phosphate inhibitors. Comprising entirely organic elements, VpCI 641 offers highly effective protection at remarkably low concentrations.

Its safety, cost-effectiveness, and ease of disposal make it a preferred choice. Moreover, VpCI 641 features a blend of contact and vapour phase corrosion inhibitors, ensuring comprehensive protection, even in partially filled spaces.

Water-Based Rust Preventative Features:

  • Non-flammable and non-toxic formulation.
  • Free from nitrites or phosphates.
  • Environmentally conscious composition.
  • Highly effective at low concentrations.
  • Economical solution.
  • Easily soluble in water.
  • Offers protection across a broad temperature spectrum, reaching up to 203ºF (95ºC).

Metals Protected

  • Brass.
  • Carbon steel.
  • Aluminium.
  • Stainless steel.
  • Copper.

Typical Applications

VpCI 641 is specifically engineered to shield metals from corrosion triggered by fresh water exposure. Its primary application often involves adding VpCI 641 to water during hydrostatic testing procedures. Additionally, it can be employed in cooling systems filled with fresh water, with a recommendation to use calcium-free water if a clear solution is preferred.

For prolonged protection following application, it is advisable to combine VpCI 641 with VCI powders. For guidance on the appropriate dosage rate, please consult a representative from Cortec.


VpCI 641 packaging is available in plastic containers (5 gallons/19 liters), liquid totes, bulk, and metal drums (55 gallons/208 liters).

Product Specifications (.PDF)

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