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Without precision engineering in this critical area, wind pressure can push moisture-laden air through the corner and up the frame, leaking into the home and rotting the frame.
-Fit securely behind the weatherstrip to help block wind-driven moisture infiltration.
-Designed to mate with our inswing sills to complement weathersealing performance. (Not required for outswing sills.)
-Flexible, foam-filled material holds its shape over time, protected by a durable jacket to resist moisture and wear.
