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NuKoat® RP220 Non-nitrite liquid rust inhibitor

  • NuKoat Rp220 water soluble synthetic rust preventative

Part Number: rp220-55g
  • Primary Application: Non-nitrated liquid rust inhibitor.
  • pH: 10.0
  • VOC: (g/L): 0
  • Foam: Low
  • Water Soluble: Yes
  • Oil Based: No


NuKoat RP 220 is an aqueous, non-nitrated liquid rust inhibitor designed for protecting ferrous metals during in-process operations that require temporary rust inhibition. NuKoat RP 220 will provide dry indoor rust inhibition for up to 20 weeks, depending on conditions. NuKoat RP 220 is a low odor, non-staining product that is free of other undesirable constituents. The environmentally friendly formula for easy disposal and handling.


NuKoat RP 220 is applied by either spray or immersion. For maximum indoor protection use full strength. Coatings can be heat-treated. NuKoat PR 220 will not interfere with most finishing operations. If desired can be easily removed with a mild cleaner. NuKoat RP 220 is free of silicates and hydroxides that interfere with the heat treating operation. It produces a dry organic film which produces no adverse effects when exposed to high temperatures. Immerse parts from 15-60 seconds depending on the application.

  • Non-nitrated – prevents formations of nitrosamines.

  • Non-Caustic – eliminates caustic dry down.
  • Silicate free – eliminates silicate dry downs that can interfere with subsequent coatings.
  • Non-emulsifying – floats oils allowing skimming to extend tank life and facilitate disposal.
  • Non-foaming – allows for use in unheated spray washers.
  • Bio-resistant – aids in tank life and pH control.
  • To the best of our knowledge, this product is California Prop 65 compliant.

Typical Usage Parameters:

  NuKoat RP 220
Description Ferrous Spray & Immersion
Concentration Range 20-100%
Operating temperatures Ambient to 130°F
Time (min) As required 15-60 seconds
Ferrous Metals ·
Physical Properties:
  NuKoat RP 220
pH, concentrate 10.5
pH, @ 1% bv 9.8
Bulk density, #/gal 8.6
VOC 0 g/L
Flashpoint None
Chelates None
Solubility in water Complete
Biodegradable Yes
Silicated No
Availability: Available in 5, 55 and 275-gallon containers. Bulk tank shipments also available.
Shipment: Freight classification: “Cleaning Compound, NOBIN – Liquid.”
Storage: Keep from freezing. Store between 40-120°F.
Disposal: Dispose of in accordance with local, state, and federal regulations. For assistance with disposal contact NuGeneration Technologies at 888-99-NuGen or email:
NuKoat RP220 Non-nitrite liquid rust inhibitor