None of our test sticks have shown any yellowing or darkening. While 60 days is not sufficient to state emphatically that it will never darken, we have found that finishes tend to discolor greatest during the first few weeks of UV exposure. LS Supreme has come through the early tests with flying colors and we feel confident in saying it will remain quite clear and free from discoloration under normal use. The finish cured hard enough within 3 days, although we could and still can apply enough pressure with a thumbnail to dent the surface. We do wish it would cure just a tad harder, but it is certainly not what anyone would describe as soft in its present incarnation.
Flexibility is excellent.
The folks at Trondak plan to keep the standard version, or Regular LS2000, in the line up along with the new LS Supreme. They needn't do so. The new LS Supreme is so versatile that it will serve the needs of those who desire a thick, or thin coating, equally well. It is easily U-40's best effort at epoxy rod finish to date and there is little, if anything, to complain about. It's a good product that is easy to use and gives great results.