Sealing system for movable window of rear window assembly

A slider window assembly for a vehicle, said slider window assembly comprising:

• a frame portion having an upper rail and a lower rail;
• at least one fixed window panel that is fixed relative to said frame portion, said at least one fixed window panel defining an opening;
• a movable window panel that is movable along said upper rail and said lower rail, wherein said movable window panel is movable between a closed position, where said movable window panel is disposed at said opening, and an opened position, where said movable window panel is disposed at least partially along said at least one fixed window panel;
• a perimeter seal disposed at said at least one fixed window panel, wherein said perimeter seal comprises a single continuous sealing element that circumscribes said opening and that is configured to substantially seal against a surface of said movable window panel about a periphery of said movable window panel when said movable window panel is in its closed position;
• wherein said perimeter seal comprises an elongated upper sealing portion, an elongated lower sealing portion, a first elongated side sealing portion and a second elongated side sealing portion;
• wherein said elongated upper sealing portion, said elongated lower sealing portion, said first elongated side sealing portion and said second elongated side sealing portion comprise respective elongated body portions and sealing lips that extend substantially along said body portions;
• wherein said perimeter seal comprises corner sealing portions established between adjacent ends of the elongated sealing portions;
• wherein said corner sealing portions comprise a body portion that is molded partially over said body portions of adjacent elongated sealing portions to retain the elongated sealing portions relative to one another;
• and
• wherein said corner sealing portions comprise a curved sealing lip that extends between ends of said sealing lips of the adjacent elongated sealing portions to provide a continuous sealing lip between said sealing lips of the adjacent elongated sealing portions.

A method of forming a unitary perimeter seal for attachment at a fixed window panel of a slider window assembly of a vehicle, said unitary perimeter seal configured to slidingly seal against a movable window panel of said slider window assembly, said method comprising:

• extruding an upper sealing portion, a lower sealing portion, a first side sealing portion and a second side sealing portion, wherein said upper sealing portion, said lower sealing portion, said first side sealing portion and said second side sealing portion each have elongated body portions and sealing lips extending substantially therealong;
• arranging said upper sealing portion with one of its ends adjacent an end of said first side sealing portion and another of its ends adjacent an end of said second side sealing portion;
• arranging said lower sealing portion with one of its ends adjacent another end of said first side sealing portion and another of its ends adjacent another end of said second side sealing portion;
• and
• molding corner regions at and partially over adjacent ends of said elongated body portions of said sealing portions, wherein said corner regions comprise a curved sealing lip that provides a transition between said sealing lips of said adjacent ends of said sealing portions.