To my knowledge, Klasse AIO is not a sealant per se. Klasse actually makes a sep sealant to go on after AIO.
AIO is a chemical based polish ( no abarsives) and acrylic finish (maybe that is a sealant?) . To my understanding , many folks have followed up AIO with a wax based product and have liked the look.
Personally, I am very happy with AIO followed by the sealent.