As in it is broken off of the welded studs that hold your bumper??? my car has a European bumper and is held by two nuts connected to two studs that are welded to the frame....if those broke i would have to reweld new studs that would bolt the bumper back on...there is no glus on this earth that would make me feel safe enough to have a glued on front bumper at 75mph....or are you talking about thr rubber - but you do say "knocked my front bumper right off" that makes me think steel...and then you say "weatherstrip adhesive" that makes me think rubber...
hope this helps - good luck
jake
hope this helps - good luck
jake