Many many years ago I used this exclusively. I probably tried every other wheel cleaner out there since and still come back to P21S. Truly an excellent spray on rinse off cleaner - you can watch the brake dust just run right off. I've even left it on overnight and rinsed it off in morning. The 5L jug is an excellent value, too.

I have used a lot of wheel cleaners claiming "hose off" cleaning. This is the only one I have found that comes close. Spray it on, hose off and with a little easy scrubbing it works great. Works better with regular use. No damage ever to BBS or expensive OEM wheels. Worth the high price for me.

Between my BMW and Porsche, I needed a better wheel cleaner. After reading alot of on line reviews, I decided to try the P21s. The product cleans well and combined with the speed master wheel brush, the inside and outside of my wheels are spotless. I bit pricey, but wheel replacement is also pricey!!!!

This is a painless way to get the brake dust off wheels on both Lexus IS350 and BMW X6, both of which are notorious for producing large amounts of brake dust. I've been using it for several years and it is worth the price in time saved. I generally leave it on for up to an hour while cleaning interior and then brake dust just washes off.

At my detail shop we use P21S gel cleaner on almost every car we clean for the first time. Thats because the gel cleaner cleans the heavy buildup of brake dust on dirty neglected wheels. Once they are clean, periodic cleaning with P21S regular strength is much easier.