I'm a big fan of Permatex Hylomar (non-hardening), for the sealing and
corrosion-resistant properties spelled out by Scott.  I recently used up
nearly a tube of it completing the H2O pump job on my WBX...so I pulled the
trigger and bought a full carton of the stuff.  It's difficult to find
locally.

*http://tinyurl.com/4dt5gq7*

--
Casey