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Frigutec® engine coolants

Frigutec® OAT

Frigutec® OAT is a premium class long-life engine coolant concentrate based on 1,2-ethanediol (MEG) and Organic Additive Technology. Frigutec® OAT provides excellent protection for engines against corrosion, overheating and frost. It was developed to protect modern cooling systems in aluminium and aluminium alloys combustion engines.

Frigutec® OAT is free of nitrite, amine, phosphate, silicate and borate. Frigutec® OAT complies with most European and international standards such as ASTM D3306. We also recommend Frigutec® OAT for a number of OEM standards such as VW 774-D/F (G12+).

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Product details


Frigutec® OAT offers the user the following advantages:

  • Excellent long-term corrosion protection
  • Optimum heat transfer
  • Optimum antifreeze protection
  • Optimum protection against overheating
  • Optimum seal and rubber compatibility
  • Optimum hard water stability
  • Optimum economy due to long-term protection
  • Analyses and quality controls
  • Flexible quotation
  • Weekly, monthly, quarterly and seasonal prices possible

Standards and OEM recommendations

Frigutec® OAT exceeds the requirements of the following coolant standards:

  • ASTM D3306
  • ASTM D4985
  • ASTM D6210
  • BS 6580:2010
  • AFNOR NF R15-601 as of November 2020
  • SAE J1034
  • Önorm V5123
  • Nato S-759
  • MIL Standards Sweden FSD 8704
  • MIL Standards Italy E/L-1415
  • MIL Standards France DCSEA 615/C

Frigutec® OAT has no manufacturer’s approvals. However, we recommend the use of Frigutec® OAT for a number of OEM standards, which we will be happy to send you together with a quotation. Below are some examples:

  • VW Group TL 774 D/F (G12+)
  • Daimler/Mercedes-Benz 325.3
  • MAN 324 SNF
  • Opel/Vauxhall B 040 1065
  • Ford WSS M97B44 D


Frigutec® OAT offers year-round protection against frost and corrosion.
Frigutec® OAT concentrate must be diluted with water before use! We recommend a mixing ratio of 1:1 in volume with demineralised or distilled water. Under no circumstances should Frigutec® OAT be used with less than 33 vol.% or more than 60 vol.%.

Miscibility with other engine coolants

Frigutec® OAT concentrate only works optimally if you empty the entire cooling system, rinse it and fill it completely with Frigutec® OAT mixed with distilled water in a 1:1 ratio.
In principle, Frigutec® OAT can be mixed with all commercial engine coolant agents based on 1,2-ethanediol (MEG) with organic additives. However, each manufacturer has found and tested a specially optimised composition of inhibitors which, when mixed with other radiator antifreeze agents from other manufacturers, still work well, but no longer as optimally as Frigutec® OAT alone.
In the event of a warranty claim, it is often impossible to assign the cause that triggered the warranty if several different makes have been used.
Therefore, we recommend the use of Frigutec® OAT only.

Physical and chemical properties

We will be happy to inform you personally about the physical and chemical properties of our coolants. We look forward to your enquiry.

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