I know the subject has come up before so please bear with me. Over quite a period of time I have been trying out most of the commonly available tyre dressings. What I have been looking for is- long lasting finish; easy to apply (don't want the job of having to clean the wheels after applying tyre dressing) ;and pleasing result (nice matt black finish and definitely not gloss) Out of my tests, No 1 is Autoglym Rubber Cleaner (trade item-comes in 5 litre can- not to be confused with what comes in 500ml containers) . You apply it with a brush, so no nasty overspray. The finish is great and lasts longer than anything. The only downside is that it should be applied to dry tyres ( so best to apply the day after you wash the car) ps I have no connection with Autoglym !