Synthetic brake fluid???

I bought a gallon of silicone fluid years ago from a Hemmings ad. Always used it in new, clean systems with no old brake fluid. Love it. No rust; everything looks brand new upon disassembly. My original stash was running out so I got some Dot4 recommended by a parts counter guy. Just before using it, I thought I'd mix a little of my silicone (which I've since learned is Dot5) with the Dot4 in a clear glass. The result was something I don't think any of us would want in our cars! The two remained liquid but clearly did not mix. So, I bought some Dot5 and it mixed perfectly. Each had a purple color. I googled 'Brake fluid' and learned a lot about the stuff. You should do the same...