I understand, blkZ28Conv. Didn't mean to mix apples and oranges. But both Klasse SG and Zaino are true (and, as I understand it, relatively "pure") polymer sealants. I'm hearing that EX may have lots of solvents. So I draw the inference (perhaps in error) that EX might cause some degradation of another polymer sealant.
And, yes, I do understand that SG can stand up to regular carnauba toppings ... provided they're not loaded with "cleaners." ... Or at least that's been my understanding.