See my Wiki via my sig below on MY take on the different grades of hair.
5 minute 2 part epoxy ( araldite here in Oz ) is what I use.
Rough up the handle hole and the knot holder of the knot to get better grip.
I only use just enough epoxy to hold the knot in. I'd rather the knot come out than put too much glue and have glue ooze out the top of the knot hole and get on the hair.
Haven't had one knot fall out yet
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