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Star International
Product code: 00950003

Star Cooltreat

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Star Cooltreat is a high performance liquid engine cooling water corrosion and scale inhibitor. It works by inhibiting electrolytic corrosion, cavitational corrosion and controls scale and sludge. It is also compatible with a wide range of hoses, gaskets and seals.

Star Cooltreat passivates metal surfaces and combines with sludges, scale and rust deposits to allow their gradual removal.


  • Internal combustion engine and compressor cooling systems.
  • Heat pump water systems.
  • Recirculating cooling water systems.
  • Hot water heating systems.
  • Suitable for jacket water used in evaporator feed heaters.
  • Chilled water systems.
  • Hot chilled water systems.
  • Ice melting water systems.
  • Compatible with Ethylene Glycol used as antifreeze.


  • Easy to use, liquid product.
  • Environmentally friendly, fully organic product with a low toxicity.
  • Effective against cavitation and erosion.
  • Superior heat transfer properties.
  • Compatible with hoses, gaskets and seals.
  • Compatible with glycols for frost protection.
  • Stable product-non depleting.


  • 25 ltrs (00950003)

Star Cooltreat should be fed directly by the bypass pot feeder to the main circulating line or into the cooling water expansion tank.

(For systems using totally de-ionised water raise nitrite levels to 1700 p.p.m. as corrosion is more likely.)

Control is based on nitrite concentration and additions should be made after representative sampling. A test kit is available for accurate checking.

Please read the Material Safety Data Sheet before using this product for detailed information on safety and health.

Target = 15 p.p.m. NITRATE
Nitrite p.p.m. 0 500 1000 1500
Ltrs/1000 ltrs make up

Target parameters

pH Between 8.3 and 10
Nitrite p.p.m. 1500 p.p.m.
Chloride Less than 50 p.p.m.
Total Hardness CaCO3 Less than 100 p.p.m.
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