It depends what you are looking for in a tire shine. If its just durability then the stuff they use at dealerships will be what you want to invest your money in. They are silicone based tire dressings which are more durable, however they have many downsides. a) they sit on the surface rather than get absorbed into the tire, what this results in is excess product sling onto your paint which can be damaging since there is a high concentration of solvents in silicone based dressings b) they can damage your tires over time and lessen the life of them. They can cause that browning look on tires and definately is not safe for events such as autocrossing.
We strongly suggest a water based dressing that is safe for your tire because they get absorbed into the tire which results in little to no sling. They give it more of the new tire look rather than the wet glossy shine. They are not damaging to the paint or tires.
Our popular ones are
Poorboy's Bold 'n Bright and
303 Aerospace Protectant.
Hope this helps your decision.
George @ Detailed Image