Sorry I keep coming back to these two! LOL
Can't help it, there's tons of great products here, I think about 0% duds.
But here's two I like, so do many others. They're both the Crème De La Crème.
Wolfgang Deep Gloss Paint Sealant 3.0
This one is great on any color, but really pops exceptionally on darker colors. Not sure if you like such, as some don't, but this product gives very hard crisp and sharp reflections, dripping wet candy apple like high gloss.
It must cure to the paint for about 40-45 minutes before removal, and needs 12 hours to fully cure before exposure to moisture such as washings, or rain-snow.
This is a product that wows immediately after wipe off, but after a few hours gives an even greater stop and stare gloss. Topped with a product like Pinnacle Crystal Mist Spray Detailer 12 or so hours later, be prepared to have your jaw hit the floor.
Another great hallmark product, Collinite #845 Liquid Insulator Wax. This one possesses a slightly "warmer" look, but with great depth in appearance.
It is a hybrid product, meaning protective ingredients are both Carnauba Wax, and Polymer Sealants combined for a long lasting 1-2 punch.
The paint takes on a quite hard shell feel to it, a pint bottle will give you well over a dozen applications, is relatively inexpensive, a little goes a long way, tremendous bang for the dollar, a very good long lasting product that won't be washing off after a few washes.
Again, looks great on any color, but will give an outstanding foot deep look to darker colors as well.
You can't go wrong with either.
Nor basically any other Autogeek House Brands featured here.