There are some statistics out there on the net about it's UV resistance. Slightly less than Sunbrella is what they say. My canoe covers are still fine after 30 yrs but they've spent most of their life in the garage. I made a cockpit cover for our Sea Pearl 21 Tri from this fabric a few years ago. It's been outside 24/7 in harsh UV at a mile high and it's still holding up although it shows some evidence of wear. It doesn't leak. I don't know what Sunbrella does in these same circumstances. The old Sunbrella cover on the Sea Pearl leaked like crazy, although it looked serviceable. I was tired of bailing the boat. The Sunbrella was probably 12 years old (+) when I got it but boat was from MI and had been stored inside in winters. Aesthetically, I think Sunbrella is more pleasing.