Lippert Components 387821 1.5 Inch Hinged Flap In-Wall Slide-Out Seal

The Lippert Components 387821 is a 1.5-inch hinged flap in-wall seal designed as a direct replacement component for Lippert's In-Wall® (Schwintek) RV slide-out systems. This seal mounts inside the wall cavity of the slide-out opening, providing a flexible barrier that helps block drafts, dust, insects, and moisture from entering the RV interior when the slide room is in the retracted or extended position.

The hinged flap design allows the seal to flex and pivot freely as the slide-out travels in and out, maintaining consistent contact with the slide panel without binding or restricting movement. The 1.5-inch profile is sized to fit the specific track and channel dimensions used on compatible Lippert In-Wall slide-out assemblies.

Key Features:

• Genuine Lippert Components replacement part — MPN 387821
• 1.5-inch hinged flap design for flexible, low-friction sealing
• Engineered for Lippert In-Wall® (Schwintek) slide-out systems
• Helps seal against drafts, insects, dust, and moisture intrusion
• Mounts within the wall cavity of the slide-out opening
• Direct OEM replacement for worn or damaged in-wall flap seals

Replacing a worn or damaged in-wall flap seal helps maintain the comfort and weatherproofing of your RV's slide-out room. Always verify compatibility with your specific slide-out model and generation before ordering.