The ValetPRO Blue Gel Wheel Cleaner is an acid based, thick gel wheel cleaner. The gel base helps increase contact time due to its ability to cling to the wheel surface. It has other benefits too. Most liquid wheel cleaners dry out quickly and create a vapour that can be easily inhaled, but gel formulations take much longer to dry out and therefore do not produce the same levels of vapour. This makes the ValetPRO Blue Gel Wheel Cleaner a great wheel cleaner for tough cleaning jobs where other cleaners falter.