RP-100 Rust Inhibitor- 1/2 Gallon

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Light blue liquid is used for light duty rust prevention on steel, iron, brass and other metals.

SKU: 5400-10065-2 Category:


Mass Finishing RP-100 Water Soluble Rust Inhibitor is formulated to be a hard drying, bio-stable water-based rust preventative. It is specially formulated to prevent corrosion to ferrous, aluminum, copper, and galvanized metals.

  • Extremely low VOCs
  • Leaves a thin, non-staining film that is dry to the touch
  • Free from nitrites, phosphates and borates
  • Completely soluble in water
  • Excellent antimicrobial properties
  • Protects ferrous and non-ferrous alloys


Mass Finishing RP-100 Rust Inhibitor is formulated for use on most metal alloys. Typical concentration into water is 2-6% percent – but protection is highly dependent on water quality. The film is easily removed by alkaline cleaner.

Typical Properties:

Values are typical and may vary within normal production ranges

Product: RP-100

Film Type Dry
Inside Storage @2-6% concentration (months) 3-6
Specific Gravity  1.02
pH (neat)  9.75
pH (1% volume) 9.25

Additional information

Weight 8 lbs