Yup, it is something like 5-5.5 because not too long ago I had asked Jeff from Gyeon about whether a wheel cleaner like Wheel Brightener which I like to use for maintenance cleaning could be used on wheels coated with Gyeon Rim without stripping or degrading it and he said it would be fine because Gyeon Rim can handle anything between 4.5 to 11 on the ph scale without it removing it.
People tend to freak out whenever they hear Wheel Brightener because the thought of “acid” triggers zombie looking creatures in their heads, but the product isn’t as crazy as some fear mongers make it out to be. If it was so outrageously dangerous it outta have a higher hazard rating than Megs Non Acid Wheel Cleaner D143, but they’re actually both rated equal at level 3. If it was such a hazard do you think just anyone could just buy a gallon of it here on Autogeek? I don’t think so.
FYI Megs D101 APC dispenser bottle has this carcinogen hazard label on it [Creepy looking image eh?] and I don’t see anyone up in arms living in fear of D101...
Btw D101 has a hazard rating of 2.