HEADHUNTERS SAYS If you’re under 40 you probably have no clue what this is. If you’re over 70, it may be the only fly and line floatant you’ve ever used. The RED is the traditional Mucilin, typically used for “greasing up” dry flies. The GREEN is the “modern” Mucilin – made with silicone – that is generally used on fly lines. We carry this because few shops do, but there are always a few die-hards looking for it. And it’s great stuff.