Other Agricultural Fluids

Castrol Radicool SF

VISCOSITY - Maintenance & Repair

Castrol Radicool SF Antifreeze Coolant


Castrol Radicool SF is a long-life coolant based on monoethyleneglycol with advanced organic acid inhibitor technology. In contrast to traditional antifreeze coolants, Radicool does not contain amines, nitrites, phosphates, silicates or other inorganic inhibitors.

This coolant provides excellent corrosion protection, particularly to those engines employing light metals. It is suitable for a wide range of vehicles including cars, trucks and buses using both petrol and diesel engines. It is therefore particularly suitable for use in mixed fleets and works over a wide operating temperature range for effective engine cooling in all climates.


The special inhibitor package used in Castrol Radicool SF enables longer drain intervals with excellent protection against corrosion, cooling system blockage, overheating and freezing.

It is especially suitable for use in engines employing cast iron, aluminium, copper or combinations of these metals used in modern engine designs. It is also compatible with all standard rubber hoses, gaskets and seals used within the cooling system.

Castrol Radicool SF possesses a longer operational life by allowing extended drain intervals of 3 years plus. Longer drain intervals mean reduced cost and less possibility of harm to the environment.

Castrol Radicool SF provides excellent protection against cavitation corrosion and effective water pump lubrication, reducing wear and noise.

The additive technology used in Castrol Radicool SF prevents the build-up of calcium deposits (scale) from the use of hard water, thereby reducing the possibility of radiator blocking and restricted flow of coolant. This technology also improves the fluid’s heat transfer properties ensuring engines run at optimum temperatures.

Castrol Radicool SF is approved by several OEM’s including Mercedes Benz, Volkswagon, MAN and Ford.

It is also recommended against the following vehicle manufacturer’s specifications ;

  • General Motors GM 6277M
  • Deutz
  • Cummins IS series and N14 engines,
  • Jenbacher
  • Komatsu
  • Renault Type D
  • Jaguar CMR 8229 and MTU MTL 5048 Series 2000
  • C&I.

Castrol Radicool SF contains a bittering agent to deter accidental ingestion.

NameMethodUnitsCastrol Radicool SF
Boiling Point of Engine Coolants


ASTM D1120°C175
Density @ 20C


IP 160g/ml1.113
Foam, Tendency of Engine Coolants


ASTM D1881ml<50
Foam, break time


ASTM D1881seconds<5


ASTM D1123% wt2.6
pH, Aqueous Solution (33%)


ASTM D1287pH8.0
Reserve Alkalinity


ASTM D1121ml 0.1N HCl5.6


VisualPink mobile liquid, clear & bright.
Flash Point, COC


ISO 2592°C>120
Freezing point at 50% dilutionASTM D3321°C-37

D3306 (I), D4985, D6210
BS – BS 6580:2010
Approved – Ford WSS-M97B44-D, MAN 324 Typ SNF, MB-Approval 325.3, VW TL-774F (G12+)


Castrol Radicool SF should be diluted between 33% and 50% concentration, with deionised/distilled water. For best all round performance, it is recommended that a 50% mixture in water is used. Concentrations higher than 70% volume are not recommended.
To maintain it’s performance, Castrol Radicool SF should not be mixed with other coolants. It is recommended that cooling systems should be drained and flushed before re-filling with diluted Castrol Radicool SF.

This product has a 2 year shelf life when stored in it’s original container below 60°C, and undercover protection from hot sun and freezing conditions. Where outside storage is unavoidable, drums should be stored in a horizontal position to avoid the possibility of water ingress.
As with most antifreezes, the use of galvanised containers and components should be avoided.

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Product Data Sheet

Material Safety Data Sheet


Castrol Radicool SF Engine Radiator Coolant
12 x 1L

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