Coolant Concentrate G12, G12+

SKU: 80053

Coolant Concentrate G12, G12+ is an engine coolant concentrate (antifreeze) based on monoethylene glycol and organic additive technology. Contains no nitrites, amines, phosphates, borates, silicates and no other mineral additives.


  • Increased life time, allowing less frequent maintenance, thanks to the corrosion inhibitors which have a very low depletion rate.
  • Thermal characteristics that permit effective engine cooling without boiling.
  • Elimination of deposit problems caused by use of hard water.
  • Elimination of abrasives solids, which gives a better protection of the joints of the water pump.
  • Improved anticorrosion protection of all metals and alloys used in the cooling system of modern vehicles, especially the aluminium.
  • Protection against frost, depending upon the concentration chosen.
  • Excellent antifoaming characteristics.
  • Meets most European and International Standards.


Coolant Concentrate G12, G12+ exceeds most of the European and International quality standards:

  • AFNOR NF R15-601 (France)
  • ASTM D3306 (USA)
  • ASTM D4985 (USA)
  • CUNA NC 956-16
  • SAE J 1034
  • AS 2108 (Australia)
  • ASTM D4656 (USA)
  • BS 6580: 2010 (UK)
  • FVV Heft R443
  • UNE 26361-88

The following OEM specifications are met by Coolant Concentrate G12, G12+:

OEM OEM standard
DAF 74002
Ford WSS-M97B44-D
General Motors GM 6277M
Mercedes-Benz MB 325.3
Renault 41-01-001
Renault Trucks
SEAT TL 774 D & F (G12 / G12+)
Skoda TL 774 D & F (G12 / G12+)
Volkswagen VAG TL 774 D & F (G12 / G12+)
Volvo VCS


Suitable for both petrol and diesel engines. Coolant Concentrate G12, G12+ is an extended life antifreeze which should be replaced every 5 years or every 250.000 km for passenger vehicles or every 1.000.000 km for trucks and commercial vehicles. Original Equipment Manufacturers’ (OEMs) recommendations should be followed when replacing coolant.

Typical properties

Parameter Value
Appearance Clear liquid, free from suspended matter
Density 1,119 g/cm3
pH (50% vol in water) 8,2
Freezing point (50% vol in water) -38°C
Boiling point 172°C
Reserve alkalinity (ml HCl N/10) 6,2 ml
Water content 2,8% wt
Foaming characteristics at 88°C
Height 35 ml
Breaktime 1,5 seconds
Colour as dyed

These are typical properties and do not constitute a specification, for specification limits please refer to product specification.

Freeze protection

Coolant Concentrate G12, G12+ is a concentrated product and should be diluted for use with good quality water. TecLub recommends that for optimum performance distilled or deionized water is used. The freeze protection afforded by the various dilutions is detailed in the table below:

OAT Coolant (vol %) H2O (vol %) Freeze Protection (°C)
33 67 -20
50 50 -40
67 33 -70

In order to provide a satisfactory level of corrosion protection it is recommended to use at least 33% (1:2) volume of Coolant Concentrate G12, G12+ in the coolant solution. In line with most car manufacturers TecLub recommends a 50% (1:1) volume solution for optimum performance. For cold climates use 67% (2:1) volume, concentrations above 67% volume are not recommended and give no advantage.

Corrosion Protection

Protection from corrosion is the most important function of a coolant concentrate and is achieved by the inclusion of a well-balanced inhibitor package. In modern engines with the greater use of aluminium alloys and thinner section castings, avoidance of corrosion problems is critical. The tables below demonstrate the effective corrosion protection provided when tested against the industry standards such as ASTM D1384 (multi-metal corrosion in glassware) and ASTM D4340 (corrosion of cast aluminium alloys under heat-rejecting conditions).

ASTM D1384 (Glassware Corrosion, mg per test piece)

Test specimen MEG
(33% vol in H2O)
OAT Coolant
(33% vol in H2O)
ASTM D3306 limit
Copper 6.5 0 10
Solder 345 -5 30
Brass 8 1 10
Steel 1474 1 10
Cast iron 2472 1 10
Aluminium 30 1 30

ASTM D4340 (Corrosion of Cast Aluminium Alloys under Heat-Rejecting Conditions)

Mass change (mg/cm2/week) ASTM D3306 limit
0.2 1.0


Although it is always recommended to use deionized or demineralized water to dilute antifreeze, Coolant Concentrate G12, G12+ is formulated to be able to cope with different water qualities and is compatible with hard water. Coolant Concentrate G12, G12+ is fully miscible with other coolants and can be safely mixed with them. However, as Coolant Concentrate G12, G12+ employs an inhibitor type that is very different to that used in traditional mineral coolants it recommended to drain and flush cooling systems containing them before recharging with diluted Coolant Concentrate G12, G12+ . Failure to do so could significantly lower the performance and longevity of the product.

Storage and Handling

Coolant Concentrate G12, G12+ has a shelf life of minimum four years when stored in air tight containers at a maximum temperature of 30°C. Translucent containers should not be stored outside in direct sunlight, especially in warm climates. Coolant Concentrate G12, G12+ can be stored in mild steel, lacquer lined or HDPE containers. As with any glycol-based engine coolant the use of galvanized steel is not recommended for pipes or any other part of the storage/mixing installation. Disposal of used or unused coolant must be carried out in accordance with local and national law, consult the material safety data sheet for further information.

Product sheet

Coolant Concentrate G12, G12+

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