Qualguard Si-OAT 50/50 Coolant

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Product Details

Qualube Qualguard 50/50 Si-OAT Coolant is pre-mixed ready to use engine coolant concentrate based on monoethylene glycol. This product employs the latest antifreeze technology which combines the benefits of both organic technology and traditional mineral (silicate) technology. Qualube Qualguard 50/50 Si-OAT Coolant is suitable for both petrol and diesel engines and has been designed to meet the demands of OEM's who favour this combination of organic and silicate technology.


  • Increased lifetime, 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 abrasive solids, which provides better protection of the water pump joints.
  • Superior short & long term corrosion protection through combined use of organic acid & highly stabilised silicate additives, especially for aluminium engines.
  • Environmentally friendly as free from borates, phosphates, nitrates & amines.
  • Excellent anti-foaming characteristics.
  • Meets most European and International specifications.


AFNOR NF R15-601 {France), AS 2108 (Australia), ASTM D3306 {USA), ASTM D4656 (USA), ASTM D4985 {USA}, BS 6580 {UK), CUNA NC 956-16, SAE J1034, UNE 26367-88, MAN 324 Typ Si-OAT, FVV Heft R443, Porsche, Audi TL 774 G, Bentley TL 77 4 G, Bugatti TL 77 4 G, Lamborghini TL 77 4 G, Seat TL 774 G, Skoda TL 77 4 G, Volkswagen VAG TL 774 G, Cummins CES 14603, Deutz DQC CC-14, Liebherr Min LH-01-COL3A, Mercedes Benz MB 325.5 & MB 325.6, Scania, Qualube Qualguard Si-OAT Coolant is an extended life anti-freeze which should be replaced every 5-years or 250,000km passenger cars, 1,000,000km for trucks and commercial vehicles. However, the OEM (Original Equipment Manufacturers') recommendations should always be followed when replacing coolants.

Coolant 50% / Water 50% = Freeze protection -40°C

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