As others have stated this is great to use on recycled boxes that must have contradictory shipping information etc. printed on them. It's opaque enough.
It sticks but that's all it's good at. Nothing—and I mean NOTHING—can be stuck to it; not labels not stickers not stamps not even permanent marker. It won't even stick to itself (aqueous coating) meaning that all you can do with this is seal things. I actually want my money back on this one. Obviously untested in the real world.