Flex-Seal

Been using Flex Seal since the 90s on duck, goose, and Turkey quills

Love this stuff as a underlayment on my thread base

Love this stuff! And it's been around for quite a while, too... This is an "old school" product that is still worth having. I use it to treat feather wing cases such as turkey quills for spent/tent wing caddis wings, hen saddle feathers for hopper backs/over wings, pheasant tail hopper leg coating, turkey quill stonefly nymph wing cases, etc etc etc. There are a lot of uses! Try a drop of this stuff on a hen saddle feather, smooth it out and let it dry and you have a fantastic hopper overwing! Do the same thing but remove feather tip first and you've got a perfect tape wing caddis wing without the tape. This is not a UV resin, but it still dries pretty fast, usually within a minute or two. Strengthens feather fibers yet keeps them pliable and held together. Recommended!