Available at Lowes and other fine retailers.
**Where are you going to find those today?**
Pine tar is still available in hardware stores. Asphalt tar will work if thinned down a little with paint thinner. Feathers are getting hard to find but the polyester filling in modern pillows will still work.
Then there is always HOT GLUE sticks! Ouch!
A chicken plant in Dallas I know of sells the feathers to a local composting outfit. There is also a hog processing plant there as well....just saying.
I have also contemplated fiberglass insulation....