[TowerTalk] Times Microwave Ultra-flex Survival?

[Edward]

Greetings,

Trying to figure out the best long-term solution for low loss coax up a crank up tower. 

I like LMR600 but have read that the Ultraflex (UF) it does not hold up well against the elements, particularly ultraviolet rays. 

Has this issue been remedied?  If not, what's a better coax for this application?  

Shireen also has their version of UF but not sure how that would hold up....

Appreciate your input. 

73,
Ed NI6S