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The M-D BUILDING PRODUCTS 87767 is a vinyl-clad foam door gasket weatherstrip designed to seal gaps along door frames in both commercial and residential applications. Measuring 81 inches in length, this replacement gasket installs via a kerf-mount method, fitting into the pre-cut kerf slot found in standard door frames. The vinyl outer cladding protects the foam core against wear and compression over time, maintaining an effective seal against air infiltration, drafts, dust, and moisture. Licensed contractors and experienced installers handling door hardware and weatherization work are the primary installers of this product.
This gasket is suited for replacement weatherstripping projects on entry doors, commercial storefronts, and interior fire-rated doors that use kerf-style door frames. It is appropriate for both new construction and retrofit applications where the existing weatherstrip has worn, torn, or lost its sealing profile. The 81-inch length accommodates standard door frame heights in most residential and light commercial settings. Its foam core compresses to conform to minor surface irregularities, improving seal consistency across the door frame contact area.
Designed as an OEM-style replacement gasket for kerf-mount door frames in standard residential and commercial door applications where a vinyl-clad foam weatherstrip profile is required.
Installation is performed by door hardware installers, general contractors, or skilled tradespeople. Before installing, ensure the existing weatherstrip is fully removed and the kerf slot is clean and free of debris or adhesive residue. Press the gasket firmly into the kerf slot along its full length to ensure secure seating. No fasteners or adhesives are required for proper kerf-mount installation.
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