On my safety wired springs, I've replaced 2 springs so far, and fixed 4 safety wires, all were RTV'd (before and after), save for the last one because I didn't have any RTV handy when putting the cowling back on.
I double wrapped my safety wires, once outside the spring, and once through the spring, and pulled them tight, but not guitar string tight. Tight enough so if the spring were to break, things wouldn't move very much that's for sure.,
I recently adjusted my prop pitch (blades were over 2.5 degrees off from each other) and it SERIOUSLY smoothed things out, and I think this may have been the reason my springs and safety wires were breaking at what seems like a fast rate.