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The antifreeze in the coolant protects your engine!


The antifreeze in the car is to protect the engine from frost and also from overheating. At the same time it protects in the coolant the parts in the engine cooling system from wear and corrosion. The regular control and replacement of the coolant has a positive effect on the life of the entire cooling system. What there is to consider in the specifications, the mixing ratio, when buying coolant and refilling radiator antifreeze, we explain in the lower part of this page.

How the cooling system works
How do the antifreeze differ in the car?
What to consider when buying coolant?
What should I bear in mind when refilling radiator antifreeze?

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ALPINE Frostschutz LANGZEIT Kühlerfrostschutz Konzentrat C12+ G12+ 1,5L VIOLETT

Item No.: UNI111W296
Manufacturer: ALPINE
part number: 0101201
???item.ean.code???: 4003774027583
Mengeneinheit: Stück
Konzentrat:
Baugruppe: Chemische Produkte
Herstellerfreigabe: VW TL 774 F
Chem_Eigenschaft: silikatfrei
Inhalt_liter: 1,5
Gebindeart: Flasche
Ausstattungsvariante: C12+
7,95 EUR
5,30 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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ALPINE Frostschutz LANGZEIT Kühlerfrostschutz Konzentrat C12+ G12+ 5L VIOLETT

Item No.: UNI111W297
Manufacturer: ALPINE
part number: 0101202
???item.ean.code???: 4003774027590
Mengeneinheit: Stück
Konzentrat:
Inhalt_liter: 5
Baugruppe: Chemische Produkte
Herstellerfreigabe: VW TL 774 F
Chem_Eigenschaft: silikatfrei
Gebindeart: Kanister
Ausstattungsvariante: C12+
17,95 EUR
3,59 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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GEFO 3100 Frostschutzprüfer GLYCOMAT Solaranlage Frostschutz Tester

Item No.: UNI111W293
Manufacturer: GEFO
part number: 3100
Mengeneinheit: Stück
Ansaugvolumen_ml: 52
Verwendung: Kühlmittel
Ausstattungsvariante: glycomat
Messbereich_Von_c: -5
Schlauchlaenge_mm: 200
Messbereich_Bis_c: -35
Baugruppe: Werkstattgeräte
16,50 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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5L 5 Liter VALVOLINE Frostschutz MULTI-VEHICLE COOLANT Konzentrat

Item No.: UNI111W004
Manufacturer: VALVOLINE
part number: 874739
???item.ean.code???: 8710941023335
Mengeneinheit: Stück
Konzentrat:
Inhalt_liter: 5
Baugruppe: Chemische Produkte
Spezifikation: MB 325.3
Chem_Eigenschaft: dickflüssig
Gebindeart: Flasche
Ausstattungsvariante: Multi-Vehicle
22,95 EUR
4,59 EUR per 1 l

incl. VAT, excl. shipping costs

Currently not available at the time

ALPINE Frostschutz PREMIUM Kühlerfrostschutz Konzentrat 3L C13 G13 VIOLETT

Item No.: PKT672W910
Manufacturer: ALPINE
part number: 0101351
???item.ean.code???: 4003774029037
Delivery:

  • 2x Antifreeze Piece - ALPINE 0101351
13,95 EUR
4,65 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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5 Liter 5L ALPINE Frostschutz Kühler Kühlerfrostschutz Konzentrat C40 G40

Item No.: UNI111W268
Manufacturer: ALPINE
part number: 0101702
???item.ean.code???: 4003774008223
Mengeneinheit: Stück
Konzentrat:
Inhalt_liter: 5
Baugruppe: Chemische Produkte
Gebindeart: Kanister
Herstellerfreigabe: MB 325.5
Ausstattungsvariante: C40
25,00 EUR
5,00 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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ALPINE Frostschutz Kühler Kühlerfrostschutz Konzentrat 5L C11 G11 GELB

Item No.: UNI111W272
Manufacturer: ALPINE
part number: 0101142
???item.ean.code???: 4003774027552
Mengeneinheit: Stück
Konzentrat:
Inhalt_liter: 5
Baugruppe: Chemische Produkte
Ausstattungsvariante: C11
Gebindeart: Kanister
Herstellerfreigabe: SAE J1034
16,00 EUR
3,20 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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ALPINE Frostschutz PREMIUM Kühlerfrostschutz Konzentrat C13 G13 5L VIOLETT

Item No.: UNI111W277
Manufacturer: ALPINE
part number: 0101352
???item.ean.code???: 4003774029068
Mengeneinheit: Stück
Konzentrat:
Inhalt_liter: 5
Baugruppe: Chemische Produkte
Ausstattungsvariante: C13
Herstellerfreigabe: VW TL 774 J
Gebindeart: Kanister
19,95 EUR
3,99 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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ALPINE Frostschutz Kühler Kühlerfrostschutz Konzentrat 3L C11 G11 BLAU

Item No.: PKT672W909
Manufacturer: ALPINE
part number: 0101141
???item.ean.code???: 4050326007586
Delivery:

  • 2x Antifreeze Piece - ALPINE 0101141
13,00 EUR
4,33 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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ALPINE Frostschutz Kühler Kühlerfrostschutz Konzentrat 5L C11 G11 BLAU

Item No.: UNI111W273
Manufacturer: ALPINE
part number: 0101142
???item.ean.code???: 4003774027651
Mengeneinheit: Stück
Konzentrat:
Inhalt_liter: 5
Baugruppe: Chemische Produkte
Ausstattungsvariante: C11
Gebindeart: Kanister
Herstellerfreigabe: BS6580:1992, ASTM D 3306, SAE J1034, AFNOR R-15-601
17,95 EUR
3,59 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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7,5 Liter 7,5L ALPINE Frostschutz Kühler Kühlerfrostschutz Konzentrat C40 G40

Item No.: PKT952W192
Manufacturer: ALPINE
part number: 0101701
???item.ean.code???: 4003774008001
Delivery:

  • 5x Antifreeze Piece - ALPINE 0101701
40,95 EUR
5,46 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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6 Liter 6L ALPINE Frostschutz Kühler Kühlerfrostschutz Konzentrat C40 G40

Item No.: PKT952W191
Manufacturer: ALPINE
part number: 0101701
???item.ean.code???: 4003774008001
Delivery:

  • 4x Antifreeze Piece - ALPINE 0101701
33,55 EUR
5,59 EUR per 1 l

incl. VAT, excl. shipping costs

available / 1-2 working days
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The coolant circuit explained in brief

After starting, the water pump circulates the coolant in the small cooling circuit. This takes place in the engine block, the cylinder head and the heat exchanger. In front of the heat exchanger is also the fan, which provides warm air in the interior. From an operating temperature of about 75-85°C, a thermostat ensures the opening of the so-called large cooling circuit. This now also includes the radiator and the expansion tank. In addition, the radiator fan provides cool air when needed, even when stationary or at particularly high temperatures. The heat from the engine is transferred to the cooling water and transported through the cooling system to the radiator. There, the heat is dissipated to the outside air, keeping the engine at operating temperature without overheating. This temperature is of great importance for engine performance, fuel consumption and thus also for pollutant emissions.

The antifreeze in the car - the differences

The coolant also always contains an antifreeze. In addition, alcohol and various additives are added to the coolant. This means that the radiator antifreeze is contained in the cooling system all year round. Pure water should only be topped up in an emergency, for example in the event of a breakdown. Water has its boiling point at 100°C and expands when it freezes; it also promotes corrosion in the cooling system. It is therefore unsuitable as either a coolant or antifreeze.

The tasks of the coolant are the removal of heat, frost protection and the prevention of deposits. In addition, of course, the coolant should not attack seals or hoses. Furthermore, coolant reduces wear caused by cavitation. This is the formation and explosion of small vapor bubbles.

The coolant is divided into the following types:

  • IAT – inorganic substances such as silicate are contained in the cooling water.
  • OAT – the coolant contains organic substances and therefore no silicate.
  • HOAT – this coolant is a hybrid of the two mentioned above. It contains silicate for corrosion protection, while the other additives consist of organic substances.

In general, the different types should not be mixed with each other, unless it is explicitly allowed to do so.

What to consider when buying coolant?

When buying coolant, many think that you just have to choose the same color of antifreeze, then it will fit. But the color of the coolant in the cooling system says nothing about the chemical composition! Each manufacturer may use its own color system. When buying coolant, therefore, pay attention to the specifications and approvals in the operating instructions or the labeling of the expansion tank. Mixing the same or different colors of antifreeze without observing the specification is not recommended.

VW and the chemical company BASF have developed standards for the antifreeze for their products. A few other manufacturers also follow these radiator antifreeze standards.
We have compared these standards in the following table:

VW VW Approvals BASF additional names Color Description / Notes
G11 TL-774 C G48 C11 Green / Blue green
  • Coolant based on inorganic acids (IAT)
  • Containing silicate
G12 TL-774 D Red / Pink
  • OAT standard without silicates
G12+ TL-774 F G30 C12+ Red purple
  • Successor from the G12
  • OAT standard without silicates
G12++ TL-774 G G40 C12++ Red purple
  • HOAT standard
  • Offers improved corrosion protection, higher boiling point and better heat dissipation
G12evo TL-774 L G65 pink/purple
  • HOAT standard
  • high quality corrosion protection of radiator and engine
  • no flocculation or gel formation due to a special silicate stabilization
  • high compatibility with hoses, seals and paintwork
G13 TL-774 J C13 purple
  • also HOAT standard
  • Glycerin-based (from biological waste products)
G05 yellow
  • Special compatibility with cast iron motors
G33 blue green
  • Special product for the brands Peugeot and Citroen
  • Due to the color not to be confused with G11/G48!
G34 orange
  • Silicate-free special product for GM and Opel

What should be observed when refilling radiator antifreeze?

With the coolant, you should pay attention to the total amount, as well as the proportion of antifreeze. To check the total amount of coolant, look under the hood at the expansion tank. There are two marks on the coolant reservoir, the fluid level should be between "MIN" and "MAX". If it is below that, the coolant, including antifreeze, needs to be topped up. You can buy coolant either as a concentrate or as a ready mix. Do not fill up the antifreeze concentrate undiluted under any circumstances. Otherwise, the freezing point will be reached too early and the boiling point temperature and heat dissipation will be reduced. The concentrate should be mixed with distilled water, as it does not contain lime, minerals or other foreign substances. The mixing ratio of radiator antifreeze to water usually varies between 60/40 and 40/60. The exact mixing ratio is written on the products. Caution when refilling the radiator antifreeze: always let the engine cool down first before opening the cap, as it is under high pressure at runtime. After refilling, close the cap hand-tight and let the engine run for a moment. If the level of the coolant does not drop below "MIN", sufficient coolant has been added.

In addition to the total quantity, the proportion of radiator antifreeze must also be checked. To do this, the coolant in the vehicle can be tested for temperature resistance using a anti-freeze tester from Gefo, for example. Approximately every two years, the complete coolant including antifreeze should be replaced, as above all the rust protection effect is diminishing. For this purpose, a drain plug must be removed from most vehicles and the cooling system flushed through with water. It is essential to dispose of the old fluid properly at a recycling center.

With us you will find radiator antifreeze from the following well-known manufacturers:

The antifreeze for the car is available from us either as a concentrate or as a ready-mix. The overview listed on the product pages in the lower section, indicates for which vehicles the corresponding coolant is suitable. To do this, it is best to select the vehicle on the page, then the appropriate coolants are displayed. If you still have questions about the radiator antifreeze, contact our customer service with the vehicle data.