I’d read that pine resin mixed with charcoal powder was used to secure arrowheads. This is 3 parts resin to 1 part charcoal powder.
The wood held together, but was easily seperated.
I added chicken manure for more strength and got similar results. Experimenting with different amounts and ratios may produce better results. If I were to find a strong enough formula, I would then need to find a way to have it dry slower. As of now, it becomes unworkable within seconds – far from enough time to glue together the wood needed.
One idea is to add pine resin to casein glue, potentially creating a glue that not only dries slower, but is also very strong and waterproof.