To get in cheap, buy a UV light on eBay ($5) and then get some Loon UV Knot Sense or Wader Repair, (same stuff) $7.50 for a half ounce, WAY less than the other stuff, maybe not quite as good as Bug Bond, but I seriously doubt the fish will give a crap. For a dispenser the tubes are not great, I got a small syringe of one of the Tuffleye products,($4) emptied it, and filled with the Loon stuff, works great. Total $16.50, and the Loon product is available all over the place.
Our tradition is that of the first man who sneaked off to the creek when the tribe did not really need fish. Haig-Brown