Reply to "Clutch master smaller diameter replacement"

I've been out of the chemical engineering game for a century, but my understanding is, silicone fluids used in hydraulic systems are made up almost entirely of twisty long-chain molecules with no carrier fluids, and under high pressures, the chains straighten and align, allowing the fluid volume to compress a few percent. This is enough to contribute to a mushy pedal, along with more shrinkage from compressing the entrained micro-air bubbles that CANNOT be bled out. Weird, but then all silicone chemistry is weird anyway, compared to carbon-based chemistry...
As an addendum to my post above, the stuff probably will work in a hydraulic clutch since we only see about 150 psi in a typical Pantera master/slave system- too low to cause the fluid to compress very much. But given the amount of trouble inherent in Pantera clutches anyway, I wouldn't use the stuff there myself.