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Roadmechanic9
Reviewed in the United States on July 15, 2024
These pellets are the best thing for a small leak. Not going to fix a water pump or head gasket. Just take a hammer and crush them in the package and pour the powder in the radiator while running. put the cap on and drive it for about 10 miles and park it.
SSW
Reviewed in the United States on March 27, 2024
What I did was crush 1/3 recommend amount into powder then pour into radiator and go for a drive for an hour it helped. So I added a little more crushed and repeated the next day my heater core has stopped leaking.In machine shops during the assembly of engines we used to place these exact genuine GM tablets behind brand new freeze plugs. GM service manuals recommend them in applications. They have worked for decades and they are a great choice they don't sludge up cooling systems if used correctly.
Anthony M
Reviewed in the United States on December 7, 2024
Got these to band aid cooling system in my 98 chevy k1500 til I can do a head gasket job. So far so good.
Ben Sanders
Reviewed in the United States on December 30, 2024
Works great for small leaks. Stopped a very slow leak in my radiator for about 6 months, it just came back so I'm buying them again lol
Johanne
Reviewed in Canada on December 14, 2024
Pour une fuite d'antigel non visible le produit a colmaté la fuite et le système de refroidissement fonctionne a merveille . Suivre les instructions d'utilisation du produit.
James Reckord
Reviewed in the United States on October 12, 2024
great product had slow leaks in radiator several place now I dont
Grease Monkey
Reviewed in the United States on June 15, 2023
I was told to use these with a fresh engine build and new cooling system on my Tahoe.Seemed to work good enough, I never had even a hit of a coolant leak or smell under the hood.Fast forward a few years, I pick up a jeep wrangler that needed the engine rebuilt.With the fresh engine, I also freshened the cooling system.I kept noticing a faint coolant smell under the hood, but no drips.Then I remembered I had half a pack of these things left from my Tahoe build sitting in my toolbox.I dropped in two tablets per the rough estimate of the cooling system capacity, and after one good drive the coolant smell is gone!I understand these are a one-time use thing, don't use them again unless you replace components along with the coolant, so it's not an add every week type of a thing.
vigil95
Reviewed in the United States on March 24, 2020
seams to hold
Mark
Reviewed in the United States on August 11, 2019
I guess they work. Had already fixed a leak im the heater core of 1994 caprice with k-seal because I didn't find out about these until later. But when I changed my water pump I had to drain my coolant and used these on refilling.No leaks still.
Kirk Mayers
Reviewed in Canada on January 4, 2018
does not work. it actually made my leak worse. it was just a little leak and now i have to replace to rad. in case anyone is going to ask. yes i placed them in both the rad and the reservoir tank.
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