AlumAseal ASLC16 Radiator Stop Leak and Conditioner Liquid - 16 Fl oz.

I've used the powder version for yearsand it always did the trick. Since I can't add straight to the radiator anymore, I thought I'd try the liquid. So far so good. I think it's fixed the leak, now I need to know if it's a permanent fix like the powder always was.

I had a pretty large "pin hole" in my radiator. ( Just over a year old new replacement on T&C) in a cold engine. Topped Rad off with anti/water. Went on my way driving to town & back. Put about 100 miles on in 3 days. Was going to top off rad,,,,,but it was full. This stuff works. N ever had luck with Bars Leak in the past.

If you use it, it may get you home, but you will have to leave the radiator cap loose. It cannot hold up behind any pressure. It is not good at all for head gasket.

I used 2 Bottles on a 6 gallon system, drove the truck for 45 minutes and no more leaks! after multiple attempts with BAR*s alum product and repeated flushing without success i gave this one a try before I pulled the radiator and to my surprise it worked.

Although I did not use this, I have no doubt it works. One of my friends, a machnic, said that it will work, but the seals of the water pump will fail prematurely since this type of products work with heated water. He told me if your timing belt & water pump is abt ready to be changed, go for it. If not, he doesn't recommend it.

Heater core was smelly like coolant and fogged windshield .added Alumaseal liquid , turned heater on.Drove 15 miles city/ highway.car set for 3 hours , drive again the heater core is not smelly ( coolant ) and no fogging of windshield.so much work to change a heater core, was less work and less money too.had to drain some coolant to add the bottle of liquid so was some effort.

I liked the product and it worked very well and was very helpful for the use of putting in my radiator in my car.

I can't measure mileage or longevity yet but it sealed the leak in my aluminum radiator in the first warm up cycle.