Jeff Liebermann wrote in
:

I suggest you take a clue from the sailing community. Long lasting
means that anything exposed to the water or atmosphere is going to
drip, ooze, leak, evaporate, oxidize, melt, dissolve, wash off, or
otherwise disappear. It doesn't matter what the lube is made from,
it's going to disappear.

Actually I have to second that. While most of my past antennas were very
fragile affairs despite being well engineered enough to stay put in a storm,
I also do a PV install whose methods are a lot closer to things done for
strong antenna mounts. I have used various bits of stainless steel chandlery
and stranded wires, sheaves, shackles and such. eBay turns out to be an
awesome way to find such things. I'm in the UK so perhaps spoiled for choice,
surrounded by water and people selling stuff to use there, but a lot of it is
easy to send anywhere. Be willing to search wide and improvise to best efect
and cost saving.

One thing to watch: there are polyester ropes, and polypropylene. Learn the
differences, and beware the mislabelled and badly decribed supplies out
there.. I tried hard to get it right, and I still ended up with 15m of
polyproylene when I thought I was getting pre=stretched polyester!