Johnsens Radiator Stop Leak Quickly finds Leaks & Seal Them USA 12oz Bottle

Regular price $10.00

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Radiator Stop Leak Quickly finds Leaks and Seal Them 12 oz Bottle USA

 What is a radiator stop leak?

A radiator stop leak is a product that you can use to seal the leaks on your car?s radiator. Normally, a car radiator tends to wear and tears with time leading to the development of leaks. There are only two options for you to solve a leaking radiator. You can either choose to buy a new radiator as a replacement for your old one, or you can get a radiator stop leak that protects your radiator preventing further damage. The cheaper option is to use a radiator stop leak. Most radiator stop leaks come either in a liquid, powder or tablet form.

How do stop leaks actually work?

The way stop leaks works is really simple. The ground up almond shells or filler ceramic particles circulate through the radiator?s cooling system when you pour it inside. Then, while the cooling system is under pressure these particles circulate around the leak and the pressure forces them to plug the gap, therefore, sealing the leak.

Additional Features:

Made in USA. Product with Premium Quality. Easy Installation. High Reliability.


100% Guaranteed Fit!.

Key Benefits:

  • Quickly finds and seals leaks
  • Mix directly in vehicle?s coolant
  • It is a non-clogging formula when used as directed.

Package Includes:

Model: Radiator Stop Leak

Size: 12 oz each


  1. Remove Radiator cap when engine is off and cool.
  2. Start engine and idle to operating temperature. Note: Make sure radiator is full.
  3. Shake bottle (to mix product thoroughly) before pouring into radiator.
  4. Replace radiator cap
  5. Run engine at a fast idle, until the leak stops.
  6. If leak persist, have cooling system checked by a professional.


Contact us

We offer customer service, dedicated and specialized in Spanish, English and Portuguese

We can be contacted at any time through eBay messages if you have any questions, comments or product requests. 

We will respond to you within 24 hours and do our best to help you out!.

We encourage our customers to contact us with any questions or concerns!.

We'd like to be sure you are completely satisfied with your purchase.


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Free Ground Shipping within the contiguous 48 US States.

Free or competitive shipping rates for Alaska, Hawaii, Puerto Rico, US territories, APO/FPO addresses and International Destinations.

Orders received before 12:00 pm ET are shipped the same day.




We have returns in all our items, new, not installed, unopened merchandise in original packaging, may be returned within 30 days from the purchase date.


AC for cars, we work with you to ensure 100% Satisfaction Guarantee!


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