Car shampoo, containing carnauba wax, boosts your car's gloss by adding a layer of protection and shine during the cleaning stage. If you have a layer of carnauba paste wax or hybrid wax already applied to your car's paintwork, your car wax shampoo will increase its longevity, so those 2 months of protection can easily become 3 or 4. The shampoo achieves this by maintaining the very top layer of hydrophobic properties given by the wax, filling in those small grooves created over time.
Can I use a wax shampoo on normal paintwork?
Can I use these shampoos on paintwork with a ceramic sealant?