Black Box Wax or Sealant

[roadster]

Hi FOlks,



Been a while since I have been able to log in - Forum changes look nice.



Question/s please:



There is a wheel sealant that is called C5 (I think). Where can this product be obtained locally in a city please or if not locally on line?



Also, has anyone any experience with a product called Black BOx and can I get comments please?



Thanks a lot....