Wheelmuck+ is a radical brake dust cleaner, that has been specifically designed to remove brake dust effortlessly. It is PH neutral and safe to use on all wheels and painted surfaces. Wheelmuck+ is a bit smelly, but you can rest assured that component is 100% biodegradable, and is even used in the cosmetics industry. Wheelmuck+ undergoes a colour change from yellow to red as a reaction occurs to dislodge the brake dust iron contaminants, enabling it to be washed away with water.Wheelmuck+ is fast acting and has specially been formulated at a viscosity to allow easy application, and to enable it to be very cost effective.No Brushes! No Effort!