For you to avoid the commonly experienced leaking in brake systems using silicone, you must do the following (as stated above):
(1) use new rubber parts (if not all new parts); and,
(2) check with the manufactures of all the new components (that have rubber parts) to find out if all parts are compatible with silicone fluid.
Doing #2 is very difficult. Often manufacturers do not want to say their parts are all "silicone friendly" because they cannot be sure your whole system has been set-up properly, and they cannot be certain that your parts-store will have new-enough stock that has silicone-friendly rubber (Jim Carter did not, a few years ago when I used a new master cylinder that failed).
I have had silicone fluid in my '54 Suburban for several years, with no problems. It had all new brake parts, and I persisted in obtaining information that all rubber-containing parts were "silicone friendly". However, I will not be doing this on the two trucks that I am now restoring because it's not worth the time and effort. I'll be bleeding and servicing the brakes of these trucks so often that there would be no additional benefit from using silicone fluid.
Tim
