> No guarantees, but since it doesn't seem to harm anything but the
repairable pressure cap, what's to lose?

It is only anecdotal evidence that it hasn't done any harm in a couple of
instances. I haven't seen the AlumaSeal mentioned on the list before, there
there have been several debates regarding Bar's Stop Leak and similar
products.... and several reports of problems with it clogging the cooling
system up (as well as reports that it does not)...

My point is that there is some risk here that your coolant system could get
clogged...

The only proper fix is new head gaskets for leaking head gaskets and new or
welded heads for cracked heard. The Stop Leak stuff could cause problems and
a bigger bill to pay in the long run...

Bill