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Frigutec® Engine coolants

Frigutec® HDC-SF

Frigutec® HDC-SF with nitrite is a silicate-free engine coolant concentrate for heavy-duty engines based on 1,2-Ethanediol (MEG) and state-of-the-art organic acid technology (OAT). This coolant has been specially developed for improved cavitation protection in heavy-duty cast iron engines. Frigutec® HDC-SF is a silicate free alternative to our silicate containing Frigutec® HDC. Frigutec® HDC-SF provides an excellent protection for the engine cooling system against corrosion, overheating, and frost.

Frigutec® HDC-SF has been specially developed for heavy-duty cast iron diesel engines operating under special operating characteristics with a long duty cycle at or near the maximum rated conditions. Such engines are typically used in off-highway machinery for agriculture, mining, earthmoving, construction, high power stationary engines, locomotives, and marine engines.

Frigutec® HDC-SF is free from 2-ethylhexanic acid, borate, amine, phosphate, and silicate. We recommend Frigutec® HDC-SF only for vehicles where nitrite containing coolants are specified according to ASTM D4985 and ASTM D6210. For all other heavy-duty engines, we recommend to use our Frigutec® OAT-EVO.

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Product details


Frigutec® HDC-SF offers the user the following advantages:

  • Excellent cavitation protection
  • Effective corrosion protection
  • Protection against overheating
  • Effective protection against pitting
  • Free of 2-ethylhexanoic acid
  • optimal antifreeze protection
  • excellent economic efficiency due to long-term protection.
  • weekly, monthly, quarterly, and seasonal prices

Standards and OEM recommendations

Frigutec® HDC-SF has no OEM approvals. Frigutec® HDC-SF was specially developed as nitrite-containing engine coolants for heavy-duty engines. As a premium coolant, we recommend it for a wide range of the OEM vehicles and international standards.

Please request our complete OEM recommendation list.


Frigutec® HDC-SF offers excellent year-round protection against frost and corrosion.

Frigutec® HDC-SF concentrate must be diluted with water before use.
We recommend a mixing ratio of 50:50 vol.% with demineralised or distilled water. Under no circumstances should Frigutec® HDC-SF be used with less than 33 vol.% or more than 60 vol.%.

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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