Bars leaks. Every time I used it it worked

Just used it again and it worked. I think this is the fourth time I used it one on a Dodge rampage. Once on a cavalier.

Now my stratus took a few times had to use there best stuff stuff that they call A last ditch effort. And it did work then. It was leaking bad out the head gasket. This time it’s a very small leak in my caravan. So far so good. If I have to replace the radiator I will. I replace the radiator on my Jeep even though it wasn’t bad. But worse than the caravan.