Always buy the reputed brands for car care, many might not even perform the way it supposed to be. Always look for pH-neutral shampoos, else that may rip your wax/sealant away. There are wash and wax shampoos are available in the marker like ONR and Gyeon Q2M Bathe+ .
Even in foam shampoo itself, you can find non-ph-neitral and ph-neutral.