This product does a good job repelling water and dirt and helps to keep a convertible top clean and waterproof. Even though it is intended for fabric tops, in my experience it works better on vinyl convertible tops (Jeep Wrangler) than the SoftTopp product intended for vinyl. I use it on both fabric and vinyl convertible tops. I don't know about the UV protection claims, but I have a 10 year old Jeep Wrangler with the original top and the top still looks new and remains waterproof and the seam stitching is still in good condition. I also use the product on a 2012 BMW 135i convertible (fabric top) with excellent results so far.