I'm going to say it doesn't have any UV protection. I looked on the tiny little packet of polish and the 3M website and it wasn't mentioned anywhere.
I guess that's another reason I'm glad I had the Mother's kit. Their polish has UV protection and the instructions recommend reapplying it periodically (just wipe on & off with a rag.) I'll have to look tonight, but I think it even mentioned reapplying after each wash.