M-d Building Products 43304 Door Jamb Weatherstrip Seal

Product Description

The M-D BUILDING PRODUCTS 43304 is a Cinch Door Jamb Seal designed to create an airtight barrier around the top and sides of standard entry doors. It blocks air infiltration, dust, water, and insects by seating firmly into slotted door jambs. The seal is constructed from aluminum with a vinyl insert and attaches using 3M adhesive technology, eliminating the need to drill screw holes. Installation requires no special tools: measure the opening, trim to fit, peel the backing, and press into place. The flat metal surface provides a clean, low-profile finish suited to residential entry doors.

This weatherstrip seal is intended for residential entry doors where the existing door jamb includes a factory-slotted channel. It covers the full door perimeter — both sides and the top — using five 42-inch pieces plus one vinyl connector, providing enough material for one standard door. Licensed contractors, remodelers, and knowledgeable DIYers regularly install this type of product during door retrofit or weatherization work. It is appropriate for both interior and exterior entry door applications where air sealing and moisture resistance are priorities.

Key Features

• Aluminum body with vinyl insert for durable compression sealing
• 3M adhesive backing — no screw holes or fasteners required
• Fits slotted door jambs for straightforward drop-in installation
• Blocks air, dust, water, and insects around door perimeter
• Includes five 42-inch pieces and one vinyl connector for one standard door
• White finish with flat metal surface for a clean appearance

Compatibility

Designed as a replacement door jamb weatherstrip for standard residential entry doors with slotted door jambs. Fits top and side jamb channels accepting a 42-inch seal length.

Installation Notes

Installation is performed by measuring the door jamb opening, trimming each piece to the required length, and pressing the adhesive-backed aluminum channel into the slotted jamb. No power tools or fasteners are needed. Ensure the door jamb surface is clean and dry before applying to achieve full adhesive bond. Follow applicable local building energy codes when performing weatherization work on entry doors.

Technical Specifications

• Piece Length: 42 inches
• Color: White
• Material: Aluminum with vinyl insert
• Adhesive: 3M adhesive technology
• Package Contents: Five 42-inch pieces and one vinyl connector
• Coverage: One standard door (top and sides)
• Weight: 1.65 pounds
• UPC: 00043374433043

Standard Information

• Brand: M-D BUILDING PRODUCTS
• Manufacturer Part Number: 43304