PRO Inhibited Antifreeze (5 Litre) is a specialist central heating system additive designed to protect against freezing, corrosion, and scale build-up in wet heating circuits. It is formulated to be added to the water within a heating system to lower the freezing point and maintain long-term protection for metal and plastic components.

Function & Purpose

This antifreeze concentrate lowers the freezing point of the water in your central heating system, helping prevent damage from freezing temperatures. Modern formulations also contain corrosion inhibitors that protect boilers, radiators, pumps, valves, and pipework from rust and corrosion. Additionally, the scale-inhibiting components help reduce the formation of limescale deposits, which can impair heat transfer and reduce efficiency. The dual action of freeze protection and corrosion control helps maintain system reliability and efficiency in colder climates or unheated spaces.

Compatibility

PRO Inhibited Antifreeze is suitable for use in sealed central heating systems, including combi, system, and conventional boiler installations. It can be used with metal and plastic pipework and components. Before use, always check manufacturer guidelines and dilute according to the system’s water volume to ensure correct protection levels and compatibility with existing inhibitors.

Key Benefits

Adding this antifreeze solution protects against freeze damage, which can cause burst pipework, cracked heat exchangers, and other costly failures. The included corrosion inhibitors help extend component life by reducing rust and oxidation, while scale control helps maintain efficient heat transfer throughout the system. Using an inhibited antifreeze can help ensure smooth winter operation and reduce maintenance issues related to debris and corrosion.

Typical Uses

This 5 litre quantity is ideal for the initial filling or top-up of many domestic central heating systems, especially those installed in unheated spaces such as lofts, garages, or outbuildings where freeze risk is higher. It is suitable for new installations, system upgrades, or as part of routine preventative maintenance before winter.

Safe Use

Always follow dosing instructions and safety guidelines. Wear appropriate protective gloves and eye protection when handling concentrated fluid, and ensure the system is thoroughly flushed and cleaned where necessary before adding antifreeze. Correct addition and mixing help ensure consistent protection throughout the heating system.