This is the best stuff out there.  It's anerobic so it only hardens in the absence of oxygen.  Any excess will flow through the system and not gum up anything important (oil passages especially.)  Resealed a Subaru EJ25 oil pan and the oil separator plate and it worked great.  The tube was a little hard to squeeze near the end but ended up working awesome.  Highly recommended.  I used to be a big fan of the Ultra Grey, but this works even better.