[quote=samc99us]I may disagree with Bacho a tad bit here. Using the dyneema, at a minimum heat treated SK78, but better is heat treated SK99 (super pre-stretched are usual marketing terms) and you have a product that is better than steel in terms of creep and elongation. The real issue is the termination needs to set initially and compensating for that isn't trivial. The other issue is measuring the tension.
In terms of U.V exposure, I have zero issue leaving a rig up with dyneema rigging in the sun. Is it great in the tropics? No, but in the mid latitudes you probably have 4-5 years before that becomes a real issue. Chafe will likely get you first, I run decent chafe protection at the top in particular.
I run 2.5mm dyneema trap lines on the F18 and have had 3+ years out of a set left mast up April-November. I generally sell the boat before they are a problem, and again chafe is the #1 enemy, not U.V.[/quote]
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