Counter Rust™ HW-100

Counter Rust™ HW-100 is a special blend of ether carboxylic acids designed to make metalworking fluids stable in hard water while minimizing the potential for foam build-up. Counter Rust HW-100 exhibits good electrolytic stability and has a very high capacity to tie-up and disperse metal cations caused by water hardness from calcium, magnesium and others. It is effective even when the water level hardness exceeds 5,000 ppm CaCO3. Counter Rust HW-100 is ideal for use in soluble, semi-synthetic and pure synthetic metalworking fluids. Product benefits include:

  • Very effective secondary emulsifier
  • Minimizes foaming while providing hard water stability
  • Protects fatty acid soaps from hard water preventing scum build-up
  • Disperses aluminum and magnesium soaps during metalworking operations


  • Carboxylic Acid


  • Dispersant
  • Emulsifier


Market Segments:

  • Metalworking Fluid


  • Metalworking Fluid - Other