Inspect the mechanical joint first, then seal it with the approved material if the job requires sealing. Do not let insulation, ceiling, or wall cover an open or uninspected joint.
In Rectangular Duct Assembly: S-and-Drive, I’m looking at: What do I do before insulating or covering an S-and-drive joint? What should I verify before I cut, drill, seal, cover, move, or install?
Do not
Do not seal over gaps, dirt, oil, water, or a loose joint.
