I replaced my severely rotted rear hatch about five years ago.
Before installation I made sure this high priced item was going to fare better than the old unit.
As a precaution, I masked off the sides and bottom edge where the glass meets the frame.
Once the tape was secured to the glass and metal frame, I carefully caulked the exposed joint and beveled the caulk to accomodate water and ice runoff.
No open channels to allow water pooling and subsequent rust damage. You'd think they'd design a beveled gasket --- sorry, what was I thinking, I forgot about PLANNED OBSOLESCENCE.
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