Henkel Loctite PL Construction Adhesive, 10 fl oz

This is great stuff when you're doing a project by yourself but really could use another set of hands. I'm using it to build a wood fence and it's great for tacking boards in position while you attach clamps if you don't have someone else to hold them while you're screwing them in. I'm also using it to stick the metal rail brackets in place -- it grabs and holds very quickly, and once it dries completely (an hour or two) I can bolt them in without worrying about them shifting position. It is very thick and can be a little hard to squeeze out of the tube, but worth the effort. Just don't get it on your hands, because it's impossible to get it off.