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Product Description

RS-493 is a light to moderate rust stripper. This unique blend of ingredients allows the product to be used in an immersion as well as a spray system. RS-493 can be used at concentrations from 1 to 20% depending on severity of the corrosion.


RS-493 may be dispensed using a drum pump or drum proportioner. Note: Acid resistant tanks should be used. Recirculating system should be constructed out of stainless steel. Consult your Houghton Technical Representative for specific specifications.

Features & Benefits

  • Rapid rust removal to accommodate high production demands
  • No base metal attack to insure finished component integrity
  • Replaces strong alkaline of acidic products for removing light to moderate amounts of surface rust


  • Collect a 2 ML sample
  • Add sample to vial
  • Add water to the 10 ML mark
  • Add 4 drops of phenolphthalein
  • Titrate with 1.0N Sodium Hydroxide counting the number of drops required to change the color from colorless to definite pink
  • Concentration of RS-493 = drops * 0.67