For me, silicone is just too dangerous to use on my car (other than carnauba waxes, of course, which is unavoidable). I use silicone free dressings for everything including my wheel wells. Turtle Wax Tire Wax is good for a low sheen, and for those who want the shiny, glossy tires, I use a couple coats of Meguiar's Endurance High Gloss (which I have seen NO browning from).
Silicone...:scared It's scary! But that's just me! I just don't want to risk browning or corroding.
Don't the tire manufacturers specifically say not to use dressings with silicone?? I know I've read that on this board before, and it seems like I heard that at a tire store.