3M INSULATION SPRAY ADHESIVE

Used this for sealing up some ductwork in the attic and the spray pattern was surprisingly even and consistent. It dried fast and held tight even in the cold, which is exactly what I needed.

Bought this for a shop project and the spray pattern is honestly the best part—fine and even, so it didn't clump up on me like other adhesives. One can covered way more area than I expected, and the bond set fast enough that I didn't have to hold things in place for long.

Stuck a whole roll of fiberglass insulation to the ceiling in about twenty minutes, and that stuff hasn't budged an inch since. The spray pattern is nice and wide so you don't have to do a bunch of passes, which saved me a ton of time on the attic project.