Open the refrigerator door and locate the door seal gasket that runs around the inside edge of the door.
Lift up a section of the gasket with your fingers. If it does not move, use the tip of a flat head screwdriver to pry up a section of the gasket. Once lifted, hold the section of gasket up with your fingers.
Loosen the screws that are visible underneath the gasket. Do not unscrew them all the way, just loosen them halfway.
Move along the gasket, lifting it up with your fingers as you go and loosening the screws under it. As you move around the door, the insulation gasket should eventually come off.
Repeat these steps on the freezer door if necessary.