Oh ya, I remember now since I have to move my tying desk. I came across this RIO UV Knot Sealer, which can be used in the same fashion. The only thing you need to harden it is the sunlight. It can also be used as a hole patchier in your waders the only thing is apply it in the shade and move it into the sun light. I use this as a shell back on some Copper Johns and some stone flies. It's kinda flexible but is nice and durable.