Gasket for a vehicle door mirror

A flexible seal lip (1G) has a tip which projects beyond the opposite surface (1B) of the gasket (1) by inclining toward the peripheral portion of the gasket. The seal lip is formed on the opposite surface opposite a car body by continuously extending annularly along the peripheral portion of the gasket. The gasket is interposed between the mirror base (3) of a door mirror and the mounting seat (2) of plate metal set on the door or car body. The door mirror is mounted on the car body through bolts and nuts.