JLM Radiator Stop Leak

250ml / J04811
JLM Radiator Stop Leak

JLM Radiator Stop Leak seals holes up to 0.9 millimetres in radiators, coolant hoses, coolant reservoirs, heating radiators, cylinder heads, head gaskets and water pumps and cleans and prevents oxidation.


  • Suitable for all types of radiators, water pumps and heating systems
  • Can be mixed with all types of coolants and antifreeze
  • Highly suitable as a preventive cleaner and sealant
  • Protects cooling and heating systems against oxidation and blockage

Product information

As soon as Radiator Stop Leak is added to the vehicle's cooling system, its active components seal any leaks that exist up to a diameter of almost one millimetre. The cleaning effect of Radiator Stop Leak makes is ideally suited to preventing problems in the cooling system.

Radiator Stop Leakis suitable for all common cooling systems, water pumps and heating systems in all vehicles. Radiator Stop Leak has an anti-corrosive effect making it suitable for use as a preventative or for maintenance. Radiator Sealer & Conditioner Pro can be mixed with all types of ex works and after-market coolants and antifreeze.

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Top JLM Product

We have decided to stock JLM Radiator clean and flush. A service for your cooling system, cleaning general muck, oil and corrosion from coolant pipes, radiator and heaqter matrix.

JS45 Motor Garage

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