Permatex 09128 Copper Anti-Seize Lubricant, 8 oz. Also, since it is rated for very high temperatures, it works well on auto brake hardware (use sparingly).
Besides this product being an excellent anti-seize product, I found it
to be very useful in applications involving electrical contacts as well
as radio antenna connections. It can be placed on coax connectors with
great results provided care is taken not to allow it to be touching both
the center connector and the outer parts of the connector as it will
cause a short.