Sealing system for movable window of vehicular rear window assembly

A method of manufacturing a vehicular slider window assembly, the method comprising:

• providing at least one fixed window panel, the at least one fixed window panel defining an opening;
• attaching an upper rail and a lower rail at the at least one fixed window panel;
• movably disposing a movable window panel at the upper rail and the lower rail, wherein the movable window panel is movable between a closed position, where the movable window panel is disposed at the opening, and an opened position, where the movable window panel is disposed at least partially along the at least one fixed window panel;
• forming elongated sealing portions that comprise an elongated upper sealing portion, an elongated lower sealing portion, a first elongated side sealing portion and a second elongated side sealing portion;
• wherein forming the elongated sealing portions comprises forming base portions of the respective elongated sealing portions via a first shot injection molding process using a polypropylene material and forming sealing lips along the respective base portions via a second shot injection molding process using a thermoplastic elastomer;
• joining the elongated sealing portions at adjacent ends of adjacent elongated sealing portions to form a perimeter seal;
• wherein joining the elongated sealing portions at adjacent ends of adjacent elongated sealing portions comprises (i) forming a first upper corner sealing element that joins an upper end of the elongated sealing portion of the first elongated side sealing portion at a first end of the elongated upper sealing portion (ii) forming a second upper corner sealing element that joins an upper end of the elongated sealing portion of the second elongated side sealing portion at a second end of the elongated upper sealing portion, (iii) forming a first lower corner sealing element that joins a lower end of the elongated sealing portion of the first elongated side sealing portion at a first end of the elongated lower sealing portion (iv) forming a second lower corner sealing element that joins a lower end of the elongated sealing portion of the second elongated side sealing portion at a second end of the elongated lower sealing portion;
• adhesively attaching the perimeter seal at a surface of the at least one fixed window panel so as to circumscribe the opening and to seal against a surface of the movable window panel about a periphery of the movable window panel when the movable window panel is in the closed position;
• wherein joining the elongated sealing portions comprises forming the first upper corner sealing element, the second upper corner sealing element, the first lower corner sealing element and the second lower corner sealing element via the second shot injection molding process;
• and
• wherein the first upper corner sealing element extends from the sealing lip of the first elongated side sealing portion at the upper end of the first elongated side sealing portion and is spaced from the sealing lip of the elongated upper sealing portion at the first end of the elongated upper sealing portion, and wherein the first upper corner sealing element extends partially along the elongated upper sealing portion above the sealing lip of the elongated upper sealing portion.