Jetseal seems like more than just a plain sealant. It appears to be a sealant and some sort of "wax", if I may use that term, combined. I say wax because Jetseal has an incredible gloss, just like a wax, when you initially apply it, but the great gloss lasts only for two or three washes, There is still protection on your paint for about six or eight washes, perhaps, but the liquid look is gone. The quick initial degradation in the finish quality gives people the impression it is not protecting, but it is. Still, the loss of gloss (ahem) is annoying.
Jetseal's initial appearance is second to none, IMO. Fully equal to any carnauba I've ever used, and it doesn't stain plastic. For our black car I like Jetseal best, it hides swirls quite well and the gloss is spectacular, but for the others I find Zaino CS lasts longer and has far more consistent appearance over time.