A stiff brush with a curved head that sits flat against the tyre wall, for scrubbing off road grime and the brown build up left by old silicone dressings. Dressing over a dirty tyre is why dressings look patchy and disappear after one rain. Clean the rubber properly first and the finish looks better and lasts a lot longer. How to use it Spray WHEEL over the tyre and let it sit for a moment. Scrub the sidewall. If the suds coming off are brown, that is old dressing, and it needs to keep going until they run clean. Rinse, let the tyre dry, then dress it with TYRE. Good to know First clean on a neglected tyre can take two or three goes. After that, one pass keeps it there. This one is for cleaning. Applying the dressing is the Tyre Applicator Brush, and both are in the Wheel Brush Kit and Tyre Dressing Kit respectively. Keep it with your wheel gear, not your paint gear.