I spent a lot of time researching products online because I wanted something that would last longer than a year. I have a large driveway and patio so having to seal once a year was becoming costly, and a lot of work. I purchased the AR500 two years ago and I only came back because I needed a product to seal my garage floor (I went with the UTN60 for that). I figured while I was here I would review this product. It has been two years and my concrete still has the same level of gloss that it did when I first applied the product. I don't have any issues with peeling or flaking, there is definitely no yellowing, and I don't think I will have to touch it up for at least another year. I am very impressed with the life and performance of this product. I look forward to using the UTN60 now for my garage floor!