Well, I'll post this one in here since I couldn't put a post in the mis information forum regarding this subject, so when I read it, I sent an email to 3M to see what would they tell me about this.
However, I once asked that long time ago to the Automagic guys and this was their answer (writen by Mr Mike Mc Fall and with all the original stuff
"We could write books on this. Matter of fact we do. To keep it as simple as possible, waxes sit on top of an auto's paint. They contain organic products like carnauba or bees wax for durability. They may last anywhere from a few days for quick detail products to several months for carnauba waxes. No matter how good they are waxes eventually wear off. Waxes are more appropriate for older vehicles because they can fill in imperfections and scratches for a better appearance.
Sealants use polymer technology to literally bond with the paint. They do wear but very slowly. After sealants are applied you can actually polish your paint without removing the sealant. They are more suitable for use on newer vehicles. Because they "shrink" onto the paint they can actually make scratches or imperfections more visible. Before application use a mild polish to make your paint as smooth as possible."
When I get the answer from 3M, I'll post it as well.