I dissolve hard pitch in alcohol and use it as a varnish for sealing sinew wraps and some arrow shafts. For pitch glue for hafting, melt(be careful, highly volatile) the pitch and remove bark pieces, etc if any add bees wax and finely ground charcoal. I use enough beeswax so I can barely push a finger nail in it when cooled. Add the charcoal dust to give it more body. I don't use measurements. Sorry.