Zaino and Klasse are sealants that both last quite a long time and produce a wonderful durable appearance. Both, like all LSP's, require meticulous paint prep. After that there are many differences between the 2 systems.
Zaino is a poly-resin based non-acrylic product.
Klasse is an acrylic based product.
Zaino is certified VOC compliant.
Klasse :nixweiss. No one is talking with official status or stated on websites
Zaino is a cross-linking product that is the main activity after application in forming a protective shield. This reaction is catalyzible with ZFX that allows multiple applications (max 3) in one day.
Klasse dries (total evaporation of carrier solvents) and hardens during its curing period of 24 hrs. No catalysis available and only 1 application is allow per directions in 1 day.
Zaino is extremely easy to apply, if applied properly - thin, and buff off.
Klasse can be very troublesome with buffing and residual removal sometimes requiring add steps like QD'ing to even off finish. The Bill North WOWO has eliminated some of this problem but official recognition (Klasse) of this method has not been issued
As mentioned earlier, both Zaino and Klasse are heads and shoulders above other available sealants and if appearance and longevity of such (durability) are part of you equation for paint care, you can not loss with either product. :xyxthumbs