I have yet to see any kind of plastic fencing product that stands up to UV indefinitely. About 5 years before it crumbles is what I've seen.
Out of all that we've built, the cross fences we made out of fiberglass sucker rod required the least maintenance. Cutting, drilling, and handling those fiberglass posts was pretty crappy, though. It's been up since 2011 and I haven't seen them shed any fibers, but you certainly don't want to handle them with bare hands.
These are the best standoffs I have ever used for running a hot wire on an existing barbed wire fence. I always had trouble with the wire getting knocked loose from the standard 6" standoffs, the claw ones would stretch out, pin locks would just break. Once the wire is loose, it's sure to get tangled up in the barbed and short out the whole thing.
kencove.com
Out of all that we've built, the cross fences we made out of fiberglass sucker rod required the least maintenance. Cutting, drilling, and handling those fiberglass posts was pretty crappy, though. It's been up since 2011 and I haven't seen them shed any fibers, but you certainly don't want to handle them with bare hands.
These are the best standoffs I have ever used for running a hot wire on an existing barbed wire fence. I always had trouble with the wire getting knocked loose from the standard 6" standoffs, the claw ones would stretch out, pin locks would just break. Once the wire is loose, it's sure to get tangled up in the barbed and short out the whole thing.

Strainrite Outrigger with Black Pinlock Insulator, Box of 50
Strainrite Outrigger with Black Pinlock Insulator, Box of 50 - Offsets - Insulators
