I have had a lot of discussions with the industrial chemists from a very professional rubber moulding factory about pinball rubber and initially I wanted to use this type of silicon compound in my machines but from what I have learned the compound will not last anywhere near as well as standard rubber.

Of course they would say that, they want to sell you rubber! Oh and it looks like they have 
Superbands are polyurethane I believe, little bit of difference there Mike. I only use these on flippers so far.
I use Pinball Centre silicone rubber, it is AWESOME gear for longevity and still going strong on some routed machines.
NO breaks and easy to clean