M-d Building Products 06403 Aluminum Drip Cap Door Bottom

Product Description

The M-D BUILDING PRODUCTS 06403 is an extruded aluminum drip cap door bottom designed to seal the gap between the bottom of a door and the threshold. The unit features a U-shaped vinyl insert that compresses against the threshold surface, blocking air infiltration and moisture intrusion. At 1-3/4 inches wide and 36 inches long, it fits most standard residential and light-commercial door widths. The aluminum extrusion carries a white powder-coated finish for corrosion resistance and a clean appearance. Slotted fastener holes are built into the mounting flange, and all necessary fasteners are included in the package. Installation requires no special tooling, making this a straightforward field replacement for door weatherization work.

This drip cap door bottom is suited for residential entry doors, utility doors, and light-commercial applications where air and moisture sealing at the door base is required. The 36-inch length accommodates standard single-door openings and can be trimmed to length in the field with a hacksaw or tin snips. It is typically installed by general contractors, carpenters, or maintenance technicians performing weatherization or door-hardware service. The slotted holes allow lateral adjustment after initial fastening, which is useful when working with doors that are not perfectly square to the threshold.

Key Features

• Extruded aluminum construction with white powder-coated finish for corrosion resistance
• U-shaped vinyl door bottom insert seals against threshold to block air and moisture
• Slotted fastener holes allow lateral adjustment after mounting for precise fit
• 36-inch length accommodates standard single-door widths and can be field-trimmed
• Fasteners included for complete out-of-box installation

Compatibility

Designed as an OEM-style replacement or new-installation door bottom for standard residential and light-commercial swinging door assemblies requiring a drip cap and threshold seal.

Installation Notes

Installation is performed by carpenters, door-hardware technicians, or general maintenance trades. Close and secure the door before marking fastener hole locations to ensure proper alignment with the threshold. Trim the extrusion to the exact door width using a hacksaw or aviation snips before final mounting. The vinyl insert should contact the threshold surface evenly along its full length; use the slotted holes to adjust position before fully tightening fasteners.

Technical Specifications

• Width: 1-3/4 inches
• Length: 36 inches
• Material: Extruded aluminum with vinyl insert
• Finish: White powder coat
• Weight: 0.984 pounds
• Fasteners: Included
• UPC: 00043374064032

Standard Information

• Brand: M-D BUILDING PRODUCTS
• Manufacturer Part Number: 06403