For many years the German made P21s Powergel P21s Powergel was widely regarded as one of the best alloy wheel cleaner products available. The acid free gel formula being able to cling to the wheels longer than most liquid sprays and highly effective at removing that annoying build-up of black brake dust on your alloys.

Then a couple of years ago UK company Valet Pro introduced Bilberry Wheel Cleaner which rapidly gained a large following amongst car detailers and enthusiasts alike, as a challenger to be considered as the best alloy wheel cleaner. Although not a gel formula Valet Pro Bilberry is a highly effective acid free alloy wheel cleaner which like the P21s is much safer to use on your alloys than acid based wheel cleaners.

But which one is the best alloy wheel cleaner? To find out we put both products in a head-to-head test on a set of alloys that had not been cleaned for over 3 months and which had not had any kind of wheel wax or sealant applied to them.