On my rigs I rarely use anything. I trap the hair to the shank of the hook by using the knotless knot, if I do feel that I need to elongate the shank like in the withy pool rig I use black heatshrink.I also use any of the coloured silicon on my hook lengths/lead arrangement because in my opinion, although the clear silicon looks good on the bank, in the water if you get any air trapped in it,it can give it a silvery appearance