hi all - got my subi van running today! one word, WOW!!

this thing hauls a**!!
just a quick question for the group: my coolant level sensor has decided to
start leaking around the threads. what kind of sealant can i use to fix this?
is blue goo ok, or do i need some exotic $67.00 a tube stuff from the
fatherland?
tia
brian
83 urabus