I've used pine and spruce pitch both with good results. You can usually find a tree bleeding pitch pretty easily if you look around. Landscape trees are good because the lower limbs are often pruned off, and they ooze pitch around the wounds. Sticky or dry, it doesn't really matter. Put it in a tin can or something and heat it up (outside, don't try it in the house) until it's liquified. You can strain or skim the trash out of it when its melted. Mix in finely powdered charcoal until it's the consistancy you want, some people add beeswax and/or crushed dried rabbit or deer pellets. If you dont get enough charcoal and other in it, it's too brittle, if too much, it won't harden at all.