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Prestone AS127 Super Radiator Sealer - 14.5 oz.

3.3 out of 5 stars 7 customer reviews

Price: $6.63 & FREE Shipping on orders over $35. Details
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  • Helps seal larger size leaks
  • Unique combination of natural and synthetic components provides the ability to seal leaks
  • Afforded by fibrillated Kevlar particles
  • Seal even large leaks without interfering with the flow through the radiator and heater core tubes
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$6.63 & FREE Shipping on orders over $35. Details In Stock. Sold by GaTestMart and Fulfilled by Amazon. Gift-wrap available.

Frequently Bought Together

  • Prestone AS127 Super Radiator Sealer - 14.5 oz.
  • +
  • K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair
  • +
  • ATP AT-205 Re-Seal Stops Leaks, 8 Ounce Bottle
Total price: $31.84
Buy the selected items together


Product Information

Technical Details

Brand Prestone
Item Weight 1 pounds
Product Dimensions 4 x 2 x 7 inches
Item model number AS127
Discontinued by manufacturer Yes
Manufacturer Part Number AS127

Additional Information

ASIN B000CCML58
Customer Reviews
3.3 out of 5 stars 7 customer reviews

3.3 out of 5 stars
Best Sellers Rank #333,394 in Automotive (See top 100)
#43 in Automotive > Oils & Fluids > Additives > Cooling System
Shipping Weight 1.2 pounds (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First Available August 17, 2005

Warranty & Support

Warranty, Parts:Parts

Product Description

Prestone Super Radiator Sealer's special formula helps seal larger size leaks. Super Radiator Sealer takes sealing performance to a higher level. Its unique combination of natural and synthetic components provides the ability to seal leaks up to 0.016 inch x 0.5 inch. What makes this possible is the size, strength, and durability afforded by fibrillated Kevlar particles, the same materials in bullet proof vests. Super Sealer's particles have been chosen to seal even large leaks without interfering with the flow through the radiator and heater core tubes.

Customer Reviews

Top Customer Reviews

Verified Purchase
I have a 2000 model GMC Sierra, and it developed small leaks of coolant about 3 years after having the vehicle. I could not find where the leaks came from. It would not leak while driving or vehicle at running temp. It would leak only after cool down or sitting for a day or two.
At first the leak very minor, but as time went on got worse and especially during cold months would leak and leave a trail. Dealer wanted over $350 to fix leaks at gaskets and "freeze plugs". I declined as the leaks were more annoyance than a critical problem. I finally thought of trying a stop leak, and Prestone I thought would be the most reliable. It works. One 14oz added to overflow tank and driving till reached operating temp did the trick. No leaks now for 3 days. I rate excellent at this time assuming I don't run into any kind of after effects or starts leaking again. I will update at late date if that happens. But for now it works. M L Barnes
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Did the job which was to stop the leak long enough to get it into the shop. You should disregard the negative reviews about it only working for a couple of days. It isn't intended to be a permanent fix. It is meant to fix the leak long enough to get it into the shop, or home where you can replace the bad part yourself. In my case it worked well enough to get the car home, and saved me the cost of towing.
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Verified Purchase
I had been fighting a coolant leak for a month or more with no luck locating or repairing it. So I bought this as a last ditch effort. It completely solved the problem!! There has been no drop in coolant levels ever since I added this sealer!!
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Verified Purchase
I got it but it did not solve the prpblem, usually it is something else,and it was. I was worth a shot.
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