This is a general purpose automotive cooling system corrosion inhibitor concentrate. It will not reverse pre-existing corrosion problems. Cool Plus Max should be used where an antifreeze type coolant is not required, always check manufacturers recommendations before use. 1 litre makes 20 litres of coolant. Contains 400g / litre Ethylene Glycol. Silicate and Phosphate free. Contains 10ppm Bittering Agent.


  • Formulation Type: Water-based, hybrid organic acid
  • Colour: Green (other colours by request)
  • Specific Gravity: 1.05 -1.10
  • pH (2%): 7.5 – 8.5 approx
  • Hazard Class: Non-hazardous
  • Use Rate: 40-50ml/L in distilled water
  • Exceeds the performance requirements of the following standards :

Test Results

1. Glassware Corrosion : ASTM D1384 

Maximum Allowable Weight Change (mg)

AS 2108  ASTM D3306 BS 6560 GM 1825M GM 6277M CAT. EC1 Test Results
Copper  10 10 10 10 10 10 1
Solder  15 30 15 20 20 15 2
 Brass  10 10 10 10 10 10 1
 Mild Steel 10 10 10 10 10 10 1
 Cast Iron 10 10 10 10 10 10 1
 Cast Aluminm 15 30 15 20 20 20 2

No evidence of pitting or other corrosion.

2. Heat-stressed Alloy Corrosion : ASTM D4340

Heat Transfer Corrosion Rate :
0.3 mg/cm2/week
Max allowable corrosion : 1.0 mg/cm2/week
Crevice/pitting Attack : None

ASTM D1384 “Corrosion Test for Engine Coolants in Glassware” using40 ml per litre hard water.

ASTM D4340 “Corrosion of Cast Aluminium Alloys in Engine Coolants under Heat Rejecting Conditions” using 40ml per litre hard water.

Australian/New Zealand Standard 2108.1:1997 “Engine Coolants Type A and Type B for Engine Cooling Systems” using 40-50 ml per litre hard water.


1 Litre of Cool Plus Max will treat 20 litres of distilled water. If required, top-up with diluted inhibitor to avoid a rundown in concentration. Replace at 36 month / 60,000 km intervals. May be replaced more frequently depending on engine and driving conditions, or engine manufacturer’s requirements. To avoid possible incompatibility problems, do not mix with any other inhibitors or coolants.

When the vehicle is cool, drain the cooling system (including the heater), as per vehicle owner’s manual, thoroughly flush and rinse clean. Reconnect all hoses, drain plugs, etc. Fill with correct volume of coolant. Refer to the vehicle owner’s handbook for the volume needed. Fill through top opening of cooling system. Check level after engine has reached operating temperature and allowed to cool again. Any spillage on paintwork should be flushed off with water. Dispose of used material in accordance with local regulations.


Cool Plus Max is not classified as hazardous. Safety Data Sheet available. Keep out of the reach of children

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