Liqui Moly Radiator Stop Leak – 150 ML

By Liqui Moly
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About this item

  • For all cooling water and heating systems with and without water filters.
  • Very good thermal resistance and stability.
  • Friction control capability.
SKU: CO-LIQ-MOT-56096 Categories: ,


Liqui Moly Radiator Stop Leak

It’s not easy to find small leaks caused by stone chipping, porous soldered connections or hairline fractures in the cooling system on all water-cooled engines – the only clue is in the reduced coolant level. Radiator Sealant seals these types of leaks completely, easily and in an instant and safeguards the combustion chamber against damage caused by coolant ingress. Secures the combustion chamber from damages caused by coolant admission. Seals small leaks caused by stone impacts or porous soldering.

For radiator coolant and heating systems with and without water filters. Also suitable for aluminum and plastic radiators. Contents will treat up to 10 litres of coolant (dosage 1:66). Compatible with all conventional coolant additives and antifreeze. Can also be used preventively.



Weight 0.15 kg
Manufacturer Details

Liqui Moly

Country Of Origin


Frequently Asked Questions

Q1.What is Liqui Moly Radiator Stop Leak?

Ans.Liqui Moly Radiator Stop Leak is a radiator additive that is used to seal minor leaks in automotive cooling system.It stops small leaks in all cooling system components including radiators, heater cores, pipes & water pumps.

Q2.How does Liqui Moly Radiator Stop Leak work?

Ans.The additive mixes with the coolant and circulates through the cooling system.It seals small leaks caused by cracks, porous spots in the radiator, hoses and other cooling system components.

Q3.Is Liqui Moly Radiator Stop Leak safe for all types of radiators?

Ans.Yes, it is safe for use in all vehicle water-cooled systems.These also include aluminium radiators with modern coolant formulas and special sensors.

Q4.How do I use Liqui Moly Radiator Stop Leak?

Ans.Start with a cold engine.Shake the bottle well, then pour the entire contents into the radiator reservoir or coolant cap.Run the engine at idle for about 10-15 minutes to allow the additive to circulate through the coolant and seal the leaks.Top up with fresh coolant if required.Monitor for leaks over the next few days and refer to a mechanic if the coolant leak has not been fixed.

Q5.Do I need to flush the cooling system before using this product?

Ans.Flush the cooling system before use of this additive to remove any debris, old coolant, sludge & dirt which could possibly hinder the effectiveness of the product as it mixes in to the system to seal leaks.

Q6.How effective is it in sealing leaks?

Ans.It is good for sealing small leaks caused and preventing coolant loss by minor cracks, worn out seals, leaky gaskets or brittle rubber hoses.However, results may vary if the size of the leak is too large, or it is in a position that the additive cannot seal it properly.

Q7.How long does will this product be effective at stopping leaks?

Ans.The effectiveness can last for several months, even years depending on the severity of the leak and the condition of the cooling systems gaskets, rubber hoses and seals.If you still experience radiator leaks after using this product, it is best to have it inspected and repaired at your vehicle’s service centre.

Q8.Is Liqui Moly Radiator Stop Leak compatible with antifreeze and other coolant additives?

Ans.This product does not affect the chemical composition of the coolant.It is compatible with all vehicle radiators and cooling systems using all types of antifreeze and coolant.

Q9.Will this additive clog the cooling system or cause any harm?

Ans.This product is completely safe for use and will not clog the cooling system or cause any damage to the engine components.

Q10.Can I use Liqui Moly Radiator Stop Leak as a preventive measure?

Ans.This product designed for use as a repair solution for existing minor leaks.It will not work as a preventive maintenance measure.

Q11.How often can Liqui Moly Radiator Stop Leak be used?

Ans.Use this additive only when leaks are present.Overuse may not provide additional benefits.Using more than the recommended dose could potentially interfere with normal coolant circulation.

Q15.How should Liqui Moly Radiator Stop Leak be stored?

Ans.Store the product in a cool, dry place away from direct sunlight.

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