It's NOT a glue. It's a bonding type plastic. You have to rough up both sides of what your putting together, doesn't stick to smooth surfaces well. I drill a couple of small holes part way through, to give it something to grab on to. Fill the holes, uv them, and add from there. I do this on both parts. Holding the parts where you want them, I do a couple of jumpers to hold parts in place. Then I build from there. Sandable, can be drilled, tapped, etc. Look at my post Headlight repair. Stuff is awesome