There are a lot of good paint sealants which are the best option for UV protection.
Picking one depends on how you maintain your car's exterior. I apply sealant twice a year and use a product called Finish Kare 425 weekly to maintain a slick slippery paint surface. With method the car washes clean with a quick water spray and dry.https://www.autogeek.net/was.html
is a great source for car care products.
If you only want a sealant that's super easy to use, try Meguiar's G18309 Ultimate Fast Finish Spray. It works best if you apply it every couple months. But it just sprays on and wipes off.