125,000 miles of use in my rider sandcast without a problem (or ever even changing the fluid over a thirty year period). Two 400/4 Honda's each over 100,000 miles now using silicon DOT 5. Every other one of my bikes from 350/4 - CBX 1000 - VFR750 - CB1300 - Z1B plus maybe thirty others using the same.
Not one problem relating to leaks, seal swelling, etc. And if it gets spilt on the paintwork, no problems there either.
The brand I use is Automec - works for me - unfortunately therefore no basis to suggest why you have had a bad experience with it.
Chris R.