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Radiator Stop Leak, Seal Powder

  • Available now!
  • Item no.: K2-V-StopLeak
  • Our price : 2,90 €
  • Base price: 156,76 € per kg
  • including 20% VAT., plus shipping (Paket Standard)
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Radiator Stop Leak Powder is a fast acting, effective and safe liquid radiator sealant.

Due to the unique aluminum microparticles contained in the product, Radiator Stop Leak finds at lightning speed the smallest leak in the radiator and closes it effectively and safely . The preparation does not influence the refrigerant circulation so that the thermal effect of the radiator is not impaired.

It is safe for all kinds of radiator. It can be used in combinationation with other refrigerant agents.

This type of leak treatment is actually a great and efficient way of saving the cost of replacing an entire radiator.


  • Start the engine in other to warm up the radiator.
  • Turn off and check the coolant level.
  • Then pour the powder in the filling opening of the radiator or in the expansion tank.
  • (Caution: Please note that a hot radiator may never be opened, it may cause severe burns).
  • It is advisable to properly clean the radiator, preferably with K2 Radiator Flush before filling an old radiator with the sealant.
  • Then close the cap of the radiator and start the engine again. All leaks should be gone within 15 minutes.
  • If afterwards a spot in the cooler continues to leak, you probably need to completely renew the radiator at a workshop.
  • After treatment, Radiator Stop Leak protects your radiator present leaks and prevents formation of further leaks in the radiator.

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