Castrol Radicool
01736 757002VISCOSITY - Maintenance & Repair
Castrol Radicool Summer coolant and Antifreeze.
Castrol Radicool is a concentrated engine coolant for use in both petrol and diesel engines with aluminium or cast iron engines.
This coolant can be mixed using 33% concentration with purified water to give frost protection to -18 deg C, however, it is recommended to use a 50% dilution to provide optimum corrosion protection and freeze protection down to -36 deg C.
At these concentrations, this coolant will provide year-round protection. To maintain optimum performance this product should be replaced after 1 year
Castrol Radicool is a mixture of monoethylene glycol and selected chemical agents. It contains no nitrites, amines or phosphates. Because it contains no phosphate, the problems of deposits in some modern performance engines are reduced.
Castrol Radicool provides –
- protection against hard water
- effective engine cooling without boiling;
- protection against corrosion of the alloys used in the cooling system of modern vehicles;
- compatibility with conventional seal and hose materials used in engine cooling systems;
- protection against cavitation corrosion;
- efficient lubrication of water pumps
- contains bittering agent
In the majority of cases, coolants are not compatible and should not be mixed with other coolants unless directed by the equipment
manufacturer. If using Castrol Radicool for the first time, ensure that the cooling system has been adequately flushed with clean water
before use
| Name | Method | Units | Castrol Radicool |
| Density @ 20C
| ASTM D1122 | g/ml | 1.12 |
| Appearance
| Visual | – | Bright clear fluid |
| pH, Aqueous Solution (50%)
| ASTM D1287 | pH | 7.5 |
| Foam, Tendency of Engine Coolants
| ASTM D1881 | ml | 50 max |
| Foam, break time
| ASTM D1881 | seconds | 5 max |
| Water
| ASTM D1123 | % wt | 5 max |
| Boiling Point of Engine Coolants | ASTM D1120 | °C | 160 min |
D3306
BS – BS 6580:2010
Castrol Radicool has a shelf life of 2 years when stored in air-tight containers at a maximum temperature of 30°C. In warm climates, containers should not be stored outside in direct sunlight. It can be stored in mild steel lacquer-lined or HDPE containers. Galvanised containers and handling equipment should be avoided.
