On May 29, 1:03*am, Don Foreman wrote:
On Fri, 28 May 2010 18:34:37 -0400, Bob Engelhardt
...

Burndy Penetrox A. *It's used on aluminum antenna towers. *...

Ox-Gard OX-100 also works well on aluminum antennas with stainless
hardware.

LPS-3 has kept steel bolts from freezing in aluminum on the engine of
my 20 year old truck. It seems to protect zinc from rainwater quite
well too. It's a little less effective against road salt and tannic
acid from oak leaves.

jsw