Uni-Gasket® self-sealing duct system

Assembly animation--what you are viewing:

Fitting ends are appropriately undersized to allow the gasketed end to slip with some resistance into an adjoining duct section.

The gasket is pliable enough to bend back, yet is rigid enough to seal against the inside of the duct.

The connection is then secured using self-tapping sheet metal screws in accordance with SMACNA guidelines.