Radiator Refix

Professional leak stop additive

Syntix Radiator Refix is a professional triple-action additive for water-cooled systems of petrol and diesel engines. This treatment repairs small leaks, lubricates the water pump and ensures the system stays clean and well-protected.


  • Effectively repairs small leaks in the cooling system
  • Eliminates the risk of coolant insufficiency within the system
  • Improves reliability of the cooling system
  • Prevents clogging of radiator conduits and temperature sensors
  • Easy to use
  • Does not require disassembly


  • Compatible with all types of antifreeze and coolant, including OAT (Organic Acid Technology) coolants
  • Resistant to heat, vibration and pressure
  • Safe for rubber hoses, gaskets and other system components
  • Prevents the build-up of calcium deposits
  • Protects the cooling system from corrosion and oxidation
  • Lubricates the water pump, improving its functionality


Syntix Radiator Refix is suitable for use in water-cooled systems of all petrol and diesel engines and can be used as a preventative or problem-solving treatment.


Use one 400 ml bottle of Radiator Refix for an average car engine. Larger engines require a dosage of 400ml for every 10-12 litres of coolant.


  1. Set the heater control to HOT and allow the engine to warm up.
  2. Shake the bottle well and pour the appropriate amount into the cooling system through the expansion tank or directly into the radiator.
  3. Top up the system with coolant if needed.
  4. Run the engine for 5 minutes to circulate the product and seal any leaks.

NOTE: It is recommended to clean the cooling system with Radiator Flush and refill with new coolant prior to using Radiator Refix.

IMPORTANT: Do not open the cooling system while the engine is hot.


400 ML BOTTLE – REF. A0297400
12 X 400 ML PACK

Radiator Refix - Professional Leak Stop Additive - Syntix Innovative Lubricants