Black Tar Haversack?

[Soinkuhndog]

I have a have a black (tar-covered canvas?)haversack that I know was popular in Civil War times. Does anyone have history of this process? Would have it been around in Revolutionary War period and after.
Would someone moving from the east to Southern Indiana in 1800s have had one?

Thanks

 

[blacksmithman64]

Asphalt tar??? Pine tar is what you want.