Which liquid copper additive works best?

Answer

Answer

Bardahl,s STOP LEAK WITH THE PELLETS is the best stop leak I have ever used,I have had it seal water pumps which is tough.Best of all it is cheap

answer

all stop leak additives are a waste all they do is temporarily stop the leak, then make the problem worse a temporary fix that will do no damage and works better than any copper additive is good old straight from the kitchen, GROUND BLACK PEPPER. THIS WILL STOP LEAKS AND WHEN U DUMP COOLANT TO FIX ORIGINAL PROBLEM WILL JUST RUN OUT OF ENGINE AND RADIATOR WITH THE COOLANT IS ALSO AHELL OF A LOT CHEAPER
 

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