10 year old UltraLeather is kinda old. That is back in the day when it first came out. There has been improvements in polyurethanes since then. UltraLeather makes a couple of marine versions and there is another polyurethane called Elements that is for the outdoor environment. What I find intriguing about an outdoor polyurethane is the characteristics of darker colored polyurethanes staying cool(er) in the sun. A problem I have encountered with UltraLeather is when compressed (like making buttons or welt with it), it can prematurely wear out. I built cushions out of white UltraLeather on a yachts flying bridge about 4 years ago and have not heard any complaints.
Rick
Rick