Loon Outdoors Payette Paste x Tenkara Rod Co.
This stuff works great on all of our furled lines, and also works really well on the end of our crossbreed line. While your line is still dry, work some paste into your fingers and onto the line. It will keep it floating all day long. This is especially useful in the Summer time when the fish are eating on top of the water and you are using dry flies.