I've been using 303 Aerospace Protectant for the past 10 years - about £15 for 500ml and it's an excellent product. This is however is £18 for 1 litre ... I tried it quickly watered down 10:1 as I didn't want a glossy tyre (I have a lot of tyre!) - the results were amazing - this is after a week on the tyre which was brown and tired, the wheel is matt black and was also looking grey and requiring refurbishing (shame I didn't take a before pic), I didn't even prepare/scrub properly. I would say this has the same qualities as 303 at 5:1 ratios ... so roughly a 10th the price! It really is that good (and I never usually write reviews!)