Radiator coolants and fluids

Engine coolant and radiator coolant are essentially the same thing — they refer to the liquid that circulates between the engine and radiator to regulate temperature. This fluid helps absorb excess engine heat and prevent overheating or freezing, depending on the conditions. Some people use the terms interchangeably, but they both point to the same vital fluid in your cooling system. Always make sure you’re using the right type recommended by your vehicle manufacturer.

Radiator coolant comes in several colours, like green, red, or orange, depending on its chemical makeup and additives. The colour isn’t just for show — it indicates the coolant type and should match what your vehicle’s manufacturer recommends. According to NRMA, using the wrong colour or mixing types can reduce performance or even damage the cooling system. If you’re unsure, Natrad’s experts can check and recommend the right coolant radiator product for your car.

Ready-to-use radiator coolant is pre-mixed with the correct ratio of coolant and distilled water, making it convenient and reducing the risk of mixing errors. Concentrates, on the other hand, require careful dilution before use, but they can be more cost-effective if you’re topping up larger systems. Both options work well as long as they’re prepared correctly and match your vehicle’s requirements. If you’re unsure which to choose, Natrad’s team have outlined some coolant FAQs that can help you decide.

TYPE A coolant contains both antifreeze and corrosion inhibitors, making it suitable for a wide range of driving conditions, especially in extreme climates. TYPE B coolant has only corrosion inhibitors, without antifreeze, and is usually used where freezing isn’t a concern. Choosing the right type depends on your vehicle and where you drive, as each offers different levels of protection. Natrad can advise you on whether TYPE A or TYPE B radiator coolant is best for your needs.

Different radiator coolant types are designed to meet the needs of various engines, materials, and driving environments. Factors like the metal composition of your radiator, the age of your car, and the local climate all play a role in choosing the right coolant. Using the wrong type can lead to corrosion, overheating, or other system failures over time. That’s why it’s important to consult experts like Natrad to ensure you get the best radiator fluid for your specific vehicle.