Radiator Cleaner

Deposits in the cooling/heating system form barriers against heat exchange, blocking the thermostat and regulating mechanisms. Engine temperatures that are too high cause the engine to run uneconomically with increased wear and with a high risk of damage. LIQUI MOLY Radiator Cleaner removes calcareous deposits, ensuring the ideal engine temperature and reliability. Does not contain any aggressive acids and lyes.

Available pack sizes

300 ml Can sheet metal (Part No. 8369)

Technical Data Sheet


A concentrate specially developed for cooling systems in general but particularly those in motor vehicles. Dissolves contaminants containing lime and oil in radiators, heating systems, pipes and in engines. Modern formula containing complexants with active cleaning agents.

Intended use

For all cooling water and heating systems. 300 ml are sufficient for 10 l cooling water. Compatible with all standard treating agents for coolants and antifreeze.


  • does not contain acids or alkalis
  • disperses sludge
  • removes oil and grease residues
  • chemical conversion of lime
  • neutralizes acids
  • neutral behavior in contact with rubber and plastics
  • compatible with antifreezes

Areas of application

Suitable for all cooling water systems in motor vehicles, buses and commercial vehicles.


Add contents to the cooling water. Run the heating system. Depending on the degree of contamination let the engine run approximately 10 to 30 minutes. Drain the cleaner and flush out the cooling system with water. Fill the cooling system according to the manufacturer’s instructions. The content (300 ml) is sufficient for 10 liters of water.