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ENGINE COOLANT COMPONENTS

The components of engine coolants are the following:

• Water
• Ethylene or Propylene Glycol
• Corrosion Inhibitors
• Hard Water Stabilizers
• Coolant Inhibitor Stabilizers
• Antifoamants
• Dyes

COOLANT TYPES

Long Life Coolants

1. Orange in color.
2. Carboxylate based inhibitor (organic acid)
3. Ethylene glycol based
These are hybrid coolants and contain conventional and organic acid inhibitors.

Asian Coolants

1. Typically red in color.

2. Coolant technology based on amines. Potential problems occur when amine based coolant (Asian) and nitrite based coolant is mixed. A nitrosamine (carcinogen) can form.

3. Toyota still uses red amine based coolants Phosphates are also used.

4. Borates and silicates are not acceptable in Asian coolants.

5. Ethylene glycol based.

European Coolants

1. Can be green, blue or amber in color.

2. Amines and phosphates are not used (banned) in Europe.

3. Nitrites are used, but the trend is to eliminate them. Borates are not accepted by Peugeot.

4. Silicates are still used to protect high temperature aluminum.

5. Ethylene or propylene glycol based.


Anti-Freeze/ Boil Coolant

pristol 2a Anti-freeze/ Boil Coolant is a specially formulated Universal Coolant that provides superior protection against engine cooling system corrosion, particularly with those containing aluminium alloys.



33% Glycol pristol Coolant

Physical and Chemical Properties

Test Performance Test Method

pH 7.6 - 8.5 ASTM D 1287
Reserve Alkalinity, mL 0.1N HCl 2.0 min. ASTM D 1121
Specific Gravity (15°C) 1.04 – 1.05 ASTM D 1122
Freeze Point -18°C ASTM D 1177
Foaming Properties - Volume (mL) 50 max. ASTM D 1881
Foaming Properties - Break time (sec.) 5 max. ASTM D 1881
Flash Point 116°C min. ASTM D 92
Fire Point 120°C
Ash Content (% w/w) 2.5 max. ASTM D 1119
Odour Characteristic
Colour OEM Green
Shelf Life 2 years
Inhibitors and dye (%w/w) 2.5 max.
Silicon (ppm) 85 max. ICP
Chloride (ppm) 25 max. ASTM D 3634