Uv resistant silicone, you can get it at lowes
Actually I should have been more clear sorry about that, it is a clear uv silicone caulk ! I know it sounds crazy but it works better than anything and that includes meguiars. I was working on a dash and it had some kind of dirt spots that would not go away no matter what so I tried the caulk and the results were unbelievable! This stuff will bring everything back from the dead. You try it on something old and faded and you'll be amazed! Get a lint free rag and caulk out an area and just start rubbing it in,don't leave it globed on in any spots just keep rubbing until it's all worked in and smooth, it works on everything.