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Liqui Moly Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132

4.4 4.4 out of 5 stars 344 ratings
$12.10
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Purchase options and add-ons

Brand Liqui Moly
Color Silver
Style Modern
Item Weight 11.2 Ounces
Closure Type Twist-On

About this item

  • LIQUI MOLY Radiator Stop-Leak completely seals such leaks immediately with ease
  • Secures the combustion chamber from damages caused by coolant admission
  • For all cooling water and heating systems with and without water filters
  • LIQUI MOLY Radiator Stop-Leak completely seals such leaks immediately with ease
› See more product details
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From the manufacturer

Header
20132 Description
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Description
Description

Product Description

Small leaks caused by stone impacts, porous soldering points and hairline cracks in the cooling system can be easily stopped (in addition to leaks not easily seen, by noticing decreasing coolant reservoir levels after rides).

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
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Liqui Moly Radiator Stop Leak | 250 ml | Cooler additive | SKU: 20132

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What's in the box

  • RADIATOR ADDITIVE

    • Looking for specific info?

    Customer reviews

    4.4 out of 5 stars
    4.4 out of 5
    344 global ratings

    Customers say

    Customers like the performance and temperature of the engine component cap. For example, they mention it works well, has no issues, and the engine temperature is regular. That said, opinions are mixed on leakage.

    AI-generated from the text of customer reviews

    17 customers mention13 positive4 negative

    Customers are satisfied with the performance of the engine component cap. They mention it works well and lasts without any issues.

    "Excellent product" Read more

    "...Found this product and gave it a try and was amazed at how good it worked. Follow the directions and pour it - no more leak was simple." Read more

    "...major issues, but after three months I gotta say, this is a pretty amazing product...." Read more

    "...my first choice, but in this case this radiator sealer does not work on plastic parts of the radiator as stated by manufacturer, I want to clarify..." Read more

    4 customers mention4 positive0 negative

    Customers are satisfied with the temperature of the engine component cap. They mention that the engine temperature is regular, and there are no more leaks of coolant on the garage.

    "...5 hours no leak and its now been a month and no leaks and engine temp has been stable and havent had to top off coolant ever since...." Read more

    "...months later there is no coolant leak on the floor and the engine temperature is regular just as it always has been...." Read more

    "...but I have noticed that direction is a little bit harder, temperature looks normal, happy to use it." Read more

    "...I can- problem solved. No more low coolant!" Read more

    3 customers mention3 positive0 negative

    Customers appreciate the value of the engine component cap. They say it works well and saves them money on repairs.

    "Can was dented bad but who cares. Great price. And it did the trick" Read more

    "...Highly recommend will save you lots of money on repairs." Read more

    "WORKS. GOOD VALUE!..." Read more

    24 customers mention16 positive8 negative

    Customers are mixed about the leakage of the engine component cap. Some mention that it works well for small leaks, and seals up the radiator very well. However, others say that it didn't help with very little pin hole leaks and is not a real sealer.

    "Sealed persistent leak after one application in 2007 BMW 3.0 (plastic radiator)...." Read more

    "...to the T and within 5 hours no leak and its now been a month and no leaks and engine temp has been stable and havent had to top off coolant ever..." Read more

    "...Now two-three months later there is no coolant leak on the floor and the engine temperature is regular just as it always has been...." Read more

    "...Turns out the brand new radiator I bought had a leak. I can’t return it because it’s in my car and I can’t afford another one...." Read more

    Seriously it sealed up the cracked rubber o-ring at the back of my B7 A4 2.0l. Great product
    5 Stars
    Seriously it sealed up the cracked rubber o-ring at the back of my B7 A4 2.0l. Great product
    Can was dented bad but who cares. Great price. And it did the trick
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    Top reviews from the United States

    Rich
    5.0 out of 5 stars Worked Great!
    Reviewed in the United States on March 17, 2024
    Verified Purchase
    Sealed persistent leak after one application in 2007 BMW 3.0 (plastic radiator). Follow instructions carefully and check coolant levels for a few days of driving afterward as the leak(s) are sealed. Highly recommend.
    Helpful
     Report
    Abel Carranza
    5.0 out of 5 stars Unbelievable effectiveness!!!
    Reviewed in the United States on December 26, 2023
    Verified Purchase
    My porsche cayenne s had a bit of a coolant leak coming from the thermostat housing, i would have a small puddle every morning, i thought i would try this radiator leak by liquimolly, i followed instructions to the T and within 5 hours no leak and its now been a month and no leaks and engine temp has been stable and havent had to top off coolant ever since. If this can hold for at least a few months until i decide to permanently fix the leak i will say it is more than worth it.
    Helpful
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    Amazon Customer
    5.0 out of 5 stars Fixed Audi A4 Head Gasket Leak (130K)
    Reviewed in the United States on March 10, 2020
    Verified Purchase
    Audi A4 B7 with 130K miles.

    On the floor of my garage I discovered a few drips of coolant where my turbo/ECU/cold air box would be. I knew there were AC lines under the engine in that area and I thought maybe I sprung a leak in one of those lines.

    When I looked under the car I saw where the drip would form for the coolant, I was dripping off a weird spot, the K frame that holds up the engine, so it really was nothing near the far right side of the engine.

    With a flashlight I looked and found the source of the leak, it was coming out of the side of the aluminum engine block! There was a drippy triangle of coolant dried up coming from the same spot. Oh no! What I discovered was that my engine has suffered a BLOWN HEAD GASKET. I know this Audi A4 2.0T FSI engine runs hot but I didn’t expect it to blow an engine seal. I was bummed.

    So now I started my research. On the Audi forums and in Amazon reviews. I eventually chose Liqui Moly because it was highly recommended for aluminum engines.

    I ordered one bottle, followed the instructions with the install and everything was great, no drops of coolant on the garage. Problem solved! Then after about a month I got another small drop on the garage floor, obviously the Liqui Moly Radiator Stop Leak worked but the engine hole in the seal was larger than a one bottle fix. No big deal, I added a second bottle!

    Now two-three months later there is no coolant leak on the floor and the engine temperature is regular just as it always has been. This engine sealant had no adverse effect on a thermostat or anything else.

    Liqui Moly is made in Germany and seems to be tailored to the Euro Car industry.

    I can tell you it works.

    I’m very pleased. I would recommend.
    14 people found this helpful
    Helpful
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    Kenneth Johnson
    4.0 out of 5 stars Car product
    Reviewed in the United States on January 27, 2024
    Verified Purchase
    Excellent product
    Helpful
     Report
    Rick Reiff
    5.0 out of 5 stars Works in a pinch
    Reviewed in the United States on April 7, 2024
    Verified Purchase
    Works when you need a temporary fix
    Helpful
     Report
    Onur
    5.0 out of 5 stars Oh amazing
    Reviewed in the United States on February 10, 2024
    Verified Purchase
    My vehicle had leak through my radiator ,I only trusted luquimoly product. It doesn’t contain solid particulates. So since I used just half of it , leak and smell stopped . It says also preventive so material working inside the coolant with any new leaks will immediately be patched. Thank you for new chemistry
    Helpful
     Report
    Salman Aziza
    3.0 out of 5 stars Stopped my leak but jammed my water pump
    Reviewed in the United States on February 9, 2022
    Verified Purchase
    Yes it fixed the leak in my radiator but 3000 miles later my water pump went out and when i opened it up, it was gunked up with this product. I did use two bottles so just be careful start with one
    4 people found this helpful
    Helpful
     Report
    Dante
    5.0 out of 5 stars Item works as described
    Reviewed in the United States on February 9, 2024
    Verified Purchase
    The item has worked, but I have noticed that direction is a little bit harder, temperature looks normal, happy to use it.
    Helpful
     Report

    Top reviews from other countries

    Translate all reviews to English
    semir
    5.0 out of 5 stars Great product
    Reviewed in Canada on April 19, 2024
    Verified Purchase
    Great product! It stops small to medium coolant leaks within days.
    Safe and effective.
    Report
    dino ding
    5.0 out of 5 stars It works
    Reviewed in Canada on March 13, 2024
    Verified Purchase
    Stop Minor Leak.
    Report
    jean-francois gibeault
    5.0 out of 5 stars Works perfectly
    Reviewed in Canada on December 19, 2023
    Verified Purchase
    I m sold to liqui moly and again not dissapointed with this product
    Report
    Gabriel Caron
    5.0 out of 5 stars Je recommande ce produit.
    Reviewed in Canada on September 8, 2023
    Verified Purchase
    Excellent produit quand le radiateur commence être fatiguer pour les fuites.
    Report
    Amazon Customer
    5.0 out of 5 stars Read the instructions
    Reviewed in Canada on January 11, 2023
    Verified Purchase
    This product work awesome, my radiator was leaking at the front not sure where is it. Bought this product and put it in. Drove my car to work and stop leaking.
    So far is good no leak at all.
    This product is worth buying
    Thank you
    Report