In a message dated 9/16/2009 4:29:50 P.M. Eastern Daylight Time,
mbucchino@CHARTER.NET writes:

I  reiterate, if you don't want a catastrophic water pump failure,
replace the water pump.  No "leak stop" material, regardless of  brand,
is going to reverse or stop the water pump damage that is  causing the
leak there.  Internal parts are worn, and they will  continue to wear
until suddenly the pump seizes.  When it does,  all hell will break
loose.  If you remove the worn pump, and  try to turn it by hand, you'll
find that it turns with difficulty  compared to a new pump, likely with a
grinding feel when it  turns.  Bearings, shaft, something is damaged.
The leak is only  a sign of internal wear.

Not always  I had a fox that was leaking out the weep hole. I used the
subie treatment and it stopped the leak,  almost a year later I was putting  on
a timing belt and changed the water pump then.  it still wasn't  leaking
later  mark d