Anyone ever use Bar's HD Stop Leak?

[trukman1]

Actually its called Bar's Leaks Radiator Heavy Duty Stop Leak.

I found a small leak in the radiator.

Not sure I want to pull it right now. Any negative side effects using Barr's?

I'm not so worried about the radiator, as it may be replaced later, but I do wonder if it will cause any problems inside the engine (i.e. clogging water jacket/ports) over time.

Any information, as always, is greatly appreciated.