I prefer the Red Tin Mucelin, as it doesn't contain silcone. I have used it, Gerhke's Gink, and the line treatment that comes with a Thibault silk fly line.
What I have found is once the leader starts to sink, drying it and applying RTM doesn't help much, Gink will float it awhile longer. The Thibault stuff doesn't work as well. They are so easy to inexpensive to make that I will just swap a sinking one out for a dry one, let the wet one dry and re-use later.
Pete