Sealing clip for sealing openings in panels and methods of use

A method of sealing a panel opening through a panel using a sealing clip, the method comprising:

• pushing an enlarged seal of a plunger of the sealing clip through the panel opening, the sealing clip comprising:
• a body comprising a touch-off structure that extends outward from a side of a cover portion and configured to touch a first face of the panel;
• and
• the plunger that extends through a cover opening through the cover portion of the body, the plunger configured to extend through the panel opening and including the enlarged seal at an end of the plunger configured to touch an opposite second face of the panel, where the plunger is configured to retract relative to the body once the enlarged seal is inserted through the panel opening in the panel, the enlarged seal comprising an elastic, flexible material that is configured to flatten toward the second face of the panel as the plunger is retracted relative to the body to a sealed configuration thereby pulling the end of the plunger toward the touch-off portion;
• and
• retracting the plunger such that the enlarged seal is pulled against the second face of the panel.