They will (of course) try to tell you different, but it is a spray on wax.
It will work, until it doesn't.
After some time of using products like this you will see a million swirls in the paint caused by grinding dust particles (hopefully nothing larger!) into the paint.
Water is a good way to move particles off anything that needs to be cleaned.
And if it has a surfactant, like a good car wash "soap" to break the water molecules down even smaller, it works even better.