I got sealant done from Ahmad Yar bhaiās Luxe Auto Spa and he used Klasse for it. About the waxes White colors should not be treated with natural Carnauba waxes as they make it pale with time.
What I have been using are Meguiars Ultimate wax and Collinite 476s. Though Collinite probably has some Carnauba content but occasionally using it like maybe 2-3 months is good as it doesnāt let the paint to dry out, Collinite 476 has a much less paleness effect on White though than other Carbauba waxes because it is a balanced blend of synthetic and carnauba both mixed. In the meanwhile use Ultimate wax or even Motherās synthetic wax is also good.
But you gotta be careful with the source because Megs and Mothers are also coming fake in the market now. But only from a reputed place.