M-d Building Products 43300 Door Bottom Weatherstrip 36 in

Product Description

The M-D BUILDING PRODUCTS 43300 is a self-adhesive door bottom weatherstrip designed to seal the gap between a door and its threshold. Constructed from aluminum with a vinyl insert, it blocks air infiltration, dust, water, and insects at the base of an exterior or interior door. The unit arrives pre-trimmed to fit 36-inch doors and installs using 3M adhesive technology, requiring no drilling, screws, or pilot holes. Licensed HVAC technicians, building contractors, and knowledgeable homeowners install this type of seal to reduce conditioned-air loss and improve energy efficiency at door penetrations.

This door bottom weatherstrip is suited for residential and light commercial applications wherever a 36-inch door requires a bottom seal. Typical installations include exterior entry doors, utility room doors, and garage access doors where air sealing and pest exclusion are priorities. The peel-and-stick design makes it appropriate for retrofit work on existing door slabs without modifying the door or frame.

Key Features

• Aluminum body with vinyl insert seals against air, dust, water, and insects
• Pre-trimmed for 36-inch doors — no cutting required out of the box
• 3M adhesive backing eliminates the need for drills, screws, or pilot holes
• Measure, trim if needed, peel, and stick installation in under 5 minutes
• Silver finish suits standard aluminum door and frame profiles

Compatibility

Designed as a direct-fit replacement door bottom weatherstrip for 36-inch residential and light commercial doors. No specific model compatibility data was provided; verify door width and bottom clearance before installation.

Installation Notes

Installation is a general carpentry or maintenance task and does not require a licensed trade. Clean the door bottom surface thoroughly with a degreaser or isopropyl alcohol before applying the adhesive strip to ensure maximum bond strength. Measure the door width, trim the strip to length if needed, then peel the backing and press firmly into place. Allow the adhesive to cure per the adhesive manufacturer's guidance before subjecting the seal to heavy traffic or moisture.

Technical Specifications

• Material: Aluminum with vinyl insert
• Finish: Silver
• Door Width: 36 inches
• Weight: 0.542 pounds
• Adhesive: 3M adhesive technology
• Unit of Measure: Each

Standard Information

• Brand: M-D BUILDING PRODUCTS
• Manufacturer Part Number: 43300