Name of Black adhesive used to glue bandit signs on metal poles?

[Account Closed]

Hello everyone, I'm located in NYC and I just started wholesaling. I'm in the process of hanging my bandit signs but I don't know what glue is it that people use to hang on metal poles. 

Can anyone enlighten me and let me know the name?

Thanks!

[Dev Horn]

Please don't GLUE signs to poles.  :-(

Bandit signs already give us a bad name and they are surely illegal in Brooklyn even tho I know they are all over the place there.  That in itself might be a reason NOT to do them and focus instead on less crowded means to communicate to your target audience.