Larry,

I use "Ox-Gard", available from the local "Do-It Center" hardware store
outlet. Preserves overlap joints on aluminum tubing and makes them easy to
adjust and disassemble after years outdoors.

Works fine for radio waves, but does not conduct DC. Found this out the hard
way in an application where I was passing RF alongside some DC signaling
information. The RF got through just fine, the DC not so much.

-larry
K8UT
"lagagnon" wrote in message
...
I am about to refurbish an old Hy-Gain TH3-Mk3 Thunderbird tri-band
yagi. This yagi has been used in a coastal environment and thus the
aluminum is slightly pitted and most of the connecting hardware needs
replacing.

I figure steel wool would work fine for the aluminum tubing, I know
how to test the traps, but I am wondering whether to use stainless
steel or galvanized hardware? Which would react least over time with
the aluminum? Also, I remember many years ago there is an electrical
joint compound stuff for using between the tubing sleeves - can anyone
please give me some brand names of this stuff?

Any other ideas appreciated....

Larry VE7EA