Skip the floatant and carry a few of each pattern with CDC wings. Usually a fly with CDC wings will float until you catch a fish with just some drying from false casting. When you catch a fish, put it on your fly patch to dry and get out another fly. By the time you catch another fish, the first one will usually be dry.
I tried floatants years ago and finally gave up on them. They all coat the fly with a nasty layer of crap. I've been using the approach above for years now and I'm perfectly happy with how my flies float.
A good floatant is no substitute for an experienced fisherman.