Open your Kenmore freezer door.
Clench the corner of the gasket, and peel it away from the freezer door. The gasket should peel off in one piece from around the door frame.
Wash the door frame with a damp cloth to remove any grime you may find that was covered by the old gasket. Dry the frame well with a towel.
Line up the new gasket to the top of the freezer door.
Push in the gasket to pop it into the channel.
Continue to push the gasket into place along the entire freezer door frame.