The composition of coolants can vary, but they are usually designed to have good heat transfer properties and to prevent corrosion or freezing, depending on the application. Water with antifreeze agents is a common coolant in vehicles, while liquid cooling gels or mixtures of water and other chemicals are used in computers.

Coolant in a car plays a crucial role in maintaining an optimal operating temperature for the engine.

The main functions of coolant are:

1. Heat dissipation: The main function of coolant is to remove heat from the engine. An enormous amount of heat is generated during the combustion of fuel in the engine. If this heat is not effectively dissipated, the engine can overheat and suffer serious damage. The coolant circulates through the engine’s cooling system and absorbs heat as it flows through the engine.

2. Engine temperature regulation: Coolant also helps maintain an optimal operating temperature for the engine. A temperature that is too low can reduce engine efficiency, while a temperature that is too high can cause damage to components.

3. Protection against freezing and corrosion: Coolant usually contains antifreeze agents that prevent the fluid from freezing in cold conditions. It also protects the cooling system against corrosion by preventing oxidation.

4. Lubrication: In some cases, coolant can also have a lubricating effect, reducing friction between moving parts in the cooling system.

In short, coolant is essential for the proper functioning and lifespan of a car’s engine, as it helps regulate temperature and prevent damage from heat, freezing and corrosion.

What is the difference between antifreeze and coolant?

Although the terms “antifreeze” and “coolant” are often used interchangeably, there are some important differences between the two:

1. Function:

• Antifreeze: The primary purpose of antifreeze is to prevent water from freezing, thereby preventing damage to the cooling system during cold weather conditions.
• Coolant: Coolant has several functions, including regulating engine temperature through heat dissipation, preventing freezing, preventing corrosion and lubricating moving parts.

2. Composition:

• Antifreeze: Antifreeze is usually concentrated ethylene glycol or propylene glycol, which can be mixed with water in various ratios, depending on climatic conditions.
• Coolant: Coolants contain antifreeze agents together with other additives such as corrosion inhibitors, lubricants and stabilisers.

3. Use:

• Antifreeze: Mainly used to prevent water in the cooling system from freezing, especially in cold weather conditions.
• Coolant: Used to regulate engine temperature, prevent freezing, inhibit corrosion and lubricate moving parts in the cooling system.

In general, the term coolant is often used to refer to the mixture of antifreeze and water used in the cooling system of vehicles. So, while antifreeze is an important component of coolant, coolant is a more comprehensive term that covers other functions besides preventing freezing.

Good to know: Synmar antifreeze products contain both antifreeze and the specific additives that allow a coolant to be made by adding demineralised water yourself. It is important to maintain the correct mixing ratio to achieve the required frost protection (see the available technical data sheets for this).

More information:

Would you like more information, or are you curious about Synmar’s coolants and antifreeze products? Please contact us on +31(0) 33-303 3044 or send an email to info@synmar.nl