Traditional Coolant

• Also referred to as conventional coolant
• Corrosion Inhibitors based on inorganic salts; borate, nitrate, nitrite, phosphate, molybdate and silicate
• There are generally two versions of conventional coolant
                  • Automotive which is typically green in color
                  • Heavy duty which typically is purple or green

• Limited lifespan: Automotive is typically up to 2 years or 80,000 km (48,000 miles); Heavy Duty is typically up to 3,000 hours or 300,000 km (180,000 miles). This life can be extended through the proper use of supplemental coolant additives (SCA’s)
The corrosion inhibitor chemistry used in traditional coolants comes in two main types:
The light duty version is typically nitrite free and can be based on
  • Borate, silicate, nitrate
  • Borate / phosphate, silicate, nitrate
  • Phosphate, silicate, nitrate
The heavy duty diesel products are a nitrite or nitrite/molybdate version of the chemistry found in the light duty version mentioned above.
This corrosion inhibitor chemistry will protect coolant system metals such as copper, solder, brass, steel, cast iron and aluminum against cavitation and corrosion and when used in the automotive sector is generally recommended for use in older model vehicles.  The nitrite or nitrite / molybdate corrosion inhibitor components have been found to provide excellent wet sleeve liner cavitation protection when used in heavy duty diesel applications. However these corrosion inhibitors rapidly deplete in service resulting is a limited lifespan to the coolant or when designed and used in heavy duty diesel applications require the addition of SCA’s (at scheduled service intervals to ensure satisfactory protection of an engine cooling system.
These conventional coolants no longer are used as factory-fill in automobiles and light truck however some heavy duty diesel OEMs still factory fill with traditional coolants in part of their product-line. When used for this application, such fluids are referred to as “Fully Formulated” coolant since they can be used in automobiles, light duty and heavy duty diesel vehicles. Such fluid historically formed the majority of after-market coolant sales however recently they have been supplanted by newer coolant based on OAT or Hybrid technology.
Complete product line of Traditional formulas