Best Radiator Stop Leaks

[brushwacker]

What works the best and what doesn't?
Years ago i had excellent results with the dry grey granules that come in about a 2 inch tube, don't remember brand. Recent years nothing seems to be near as good that i have tried including black pepper.
Any favorites out there that are fairly consistent?

 

[Deets066]

Copenhagen

 

[Stump Shot]

Solder

 

[dmb2613]

https://www.ebay.com/itm/AlumAseal-...ScAAOSwFc5XwFQ8:sc:USPSFirstClass!23962!US!-1

works good for me

 

[Brad Hill]

Radiator Repair Shop.....


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[dmb2613]

raw eggs and pepper aint bad in a pinch

 

[dmb2613]

black pepper that is

 

[Lightning Performance]

Panel bond. All better.

 

[stihl here]

Dike

 

[RalphK]

Water glass (AKA egg preserver) sodium silicate. Not a permanent fix but a stop gap

 

[blades]

new radiator or at least recored.

 

[Pullstart]

new radiator. You don't want that stuff in your cooling system unless they are willing to pay for a head gasket job when it vows the stop leak out and overheats the cooling system. Its only a bandaid on a gash is how I see it.

 

[FergusonTO35]

I've been using the brown Bar's Leaks pellets for years with good success. Never had anything get clogged up. They were factory installed by GM for years.

 

[Pullstart]

I used to work for GM as a heavy line tech. I do remember using the pellets but that was for issues with casting if I can remember correctly. I just like fixing it right the first time.

 

[FergusonTO35]

When I worked at a private garage, we put them in any vehicle that got Dex-Cool.

 

[Bilge Rat]

Not a fan of Dex-cool.
GMs Plastic intakes also don,t make me feel good.
.

Bars leaks will get you home then you can locate the leak at your leisure.

 

[FergusonTO35]

Yep, I hate that Dex-Cool crap. Causes really crusty deposits in cooling systems.

 

[RocketRoss57]

My buddy always did the egg and pepper combo. Said he was cooking breakfast with that old ford 360.

 

[Al Smith]

On Georgias' 2002 GMC Envoy the dex cool did a number on the radiator .$1200 dollars later when the putz I hired could not figure it out I did gravity test and figured it out in about 5 minutes.$200 dollars later with a new radiator it works just fine .I've given up on so called mechanics ,might as well do it myself .These people can't be that stupid .
To the subject,black pepper will do in a pinch but like any half-fast fix is not permanent .BTW all "silver seal is is ground grain with silver flecks of something .Maybe the fixens for moon shine mash for all I know

 

[Wolverine]

I used those Bars Leaks pellets when I was a young cuss. Now I'd just pull the darn thing and have it repaired right.