• Robust high temperature rated inhibitor
  • Reversibly evaporable and rated up to 300°C
  • Protections of copper, solder, brass, steel, cast iron and aluminium
  • Compatible with all standard gaskets and seals
  • Hard water tolerant
  • Compatible with alcohol and glycol anti-freezes
  • Suitable for commercial and institutional water heating systems
  • Miscible with water and glycols
  • Long life
  • Low toxicity and biodegradable


  • Operational pHEffective between 7 - 9

  • Operational TemperatureRated up to 300°C

Physical Properties

  • Appearance:Clear straw coloured liquid

  • Consistency:Low viscosity

  • Density:1.05 - 1.10

  • Odour:Mild aroma

  • Foam:Non-foaming

  • pH:9 - 9.5

  • Available in: 1, 5, 20 litre containers ( bulk containers & tankers available on request )


Dosing depends on system size, construction materials, and fluid condition. For this reason, we recommend a system fluid sample is taken and analysed prior to any remedial work. Hydratech offers comprehensive testing and analysis services, for more information visit - Testing & Analysis

Recommended standard dosing for water based systems
Dose COR3 at 20 litres per 2000 litres of system volume, or 1% v/v of the total system volume.

Recommended standard dosing for glycol based systems
Dose COR3 at 40 litres per 2000 litres of system volume, or 2% v/v of the total system volume.

We suggest sampling and analysing system fluids biannually to catch any issues early.