Alright, I've been trying to read up on and edumicate myself on this sealant stuff. According to the Meguiar's blog, and I even called their support line and talked to some cool dude... they are saying their Ultimate Liquid Wax is considered a sealant. And a 100% synthetic polymer wax. He totally agreed that you can use their professional sealant with their carnauba on top, and many do that especially with red and black cars. But this product is suppose to give you the same protection, with much greater ease. He also recommended using their quick wax spray immediate after a wash/dry. Ever use any of those post-wash sprays?
Considering my wife's new vehicle is white, and my truck is silver, I think I am going to switch and simply use their Ultimate.