Definitely not sticky. I doubt it's tobacco. I didn't think about the sticky until you mentioned it but you're right. I remember seeing some of my friends, back in the day, when they had to go out and sucker tobacco, and then coming back with their hands covered with black resin. Some of them even got sick and having too much nicotine in their systems puked their guts out.
Maybe another form of Nicotiana, is that what you're saying?