Yes, a GSP wax for all GSP threads. This wax has been specially formulated to use with Nano Silk and EVERY GSP thread in the market. Some waxed are too harsh for the fine but extremely strong fibers of GSP threads. Semperfli GSP Wax will glide across your GSP threads and colour them black and create a tacky, waxed surface for you to add dubbing, to tie on or tie off your GSP threads