Above was my first attempt at using the Crappie.con app, and well I didn’t do so well.
OK....I looked again after all these years and it is called Surethane Tubing. My size is 1/8 (1/16” x 1/8”).
Just do a search for it as I don’t think it is on Amazon after all.
The tubing slips over the eye easily, stays put, survives the heat gun and oven, and after painting a simple twist and pull action removes it cleanly and surely leaving your hook eyes fresh and minty clean.