Sorry for the late reply on this. What I use them for are
Thick: coating junctions on articulated streamers, building heads on lead eye streamers, building eggs sacks on alevin patterns, coating synthetic fibers to stiffen them for baitfish tales (game changers) and trimmed mayfly wings ( but I actually prefer liquid fusion for this).
Thin: over coating stick on eyes on fish skulls/ sculpin helmets, building wing cases and Shell backs, making fish masks on streamers,
Coating bodies on woven minnows.
Flex: coating burned wings or wing cases, also good for making fish masks, coating leader knots
These are what’s coming to mind. Probably lots of other things I use them for.