M-d Building Products 43305 Door Jamb Weatherstrip Seal

Product Description

The M-D BUILDING PRODUCTS 43305 is a cinch-style door jamb seal designed to create an airtight barrier around the top and three sides of a standard entry door. The kit uses an aluminum extrusion with a vinyl insert that compresses against the door surface to block air infiltration, dust, water intrusion, and insects. Installation requires no drilling or screw holes. Instead, the seal attaches using a factory-applied 3M adhesive backing. The aluminum face delivers a flat, clean finish that suits painted or natural metal door frames. This seal is sold as a complete kit with enough material for one standard door.

This product is suited for residential and light commercial entry door applications where door jambs have an existing slot profile or a clean flat surface for adhesive bonding. It is commonly installed during weatherization service calls, door replacement projects, or seasonal maintenance routines. Installers working on exterior entry doors will find the peel-and-stick process straightforward. The kit includes five 42-inch pieces and one vinyl connector, covering the full perimeter of a standard door frame in a single installation.

Key Features

• Aluminum extrusion with vinyl insert creates a compressible airtight seal against air, dust, water, and insects
• 3M adhesive backing eliminates the need for screws or drill holes
• Fits slotted door jambs and flat jamb surfaces
• Kit includes five 42-inch pieces and one vinyl connector for a complete single-door installation
• Flat metal surface finish suits painted and unpainted aluminum frames
• Brown finish blends with common door frame colors

Compatibility

Designed as a replacement weatherstrip seal for standard residential entry doors with slotted or flat door jambs. Each piece measures 42 inches to fit typical door frame dimensions on a single standard door.

Installation Notes

This seal is typically installed by general contractors, handymen, or weatherization technicians and does not require licensed trade credentials. Before installation, clean the jamb surface thoroughly to remove dust, grease, and old adhesive residue so the 3M backing bonds properly. Measure and trim each piece to fit before removing the adhesive liner. Avoid installing on surfaces below the minimum application temperature specified on the adhesive packaging, as cold temperatures can reduce initial bond strength.

Technical Specifications

• Material: Aluminum with vinyl insert
• Piece Length: 42 inches
• Color: Brown
• Pieces Included: 5 jamb pieces plus 1 vinyl connector
• Coverage: Top and sides of one standard door
• Attachment Method: 3M pressure-sensitive adhesive, no screw holes required
• Weight: 1.742 pounds
• UPC: 00043374433050

Standard Information

• Brand: M-D BUILDING PRODUCTS
• Manufacturer Part Number: 43305