Thermwell A58/36H Door Bottom Seal 1.625x36 Inch Gold

Product Description

The THERMWELL A58/36H is a door bottom seal designed to reduce air infiltration, dust, and light gaps at the base of exterior and interior doors. Constructed from brite gold aluminum with a vinyl insert, this door bottom combines a rigid aluminum mounting rail with a flexible vinyl sweep that conforms to uneven thresholds. It measures 1.625 inches wide by 36 inches long, making it sized for standard single-door applications. HVAC and weatherization contractors, as well as general contractors and experienced DIYers, install this type of component as part of building envelope tightening work.

This door bottom seal is suited for residential and light commercial applications where energy efficiency and draft control are priorities. It mounts to the face or underside of a door and is typically used on wood or metal doors in entryways, utility rooms, and mechanical spaces where maintaining conditioned air and keeping out drafts, insects, and moisture is important. The brite gold finish is appropriate for doors where a traditional or neutral metallic appearance is preferred.

Key Features

• 1.625-inch width by 36-inch length fits standard single-door widths
• Brite gold aluminum rail provides rigid, durable mounting structure
• Flexible vinyl sweep seals against uneven or worn thresholds
• Aluminum and vinyl construction resists corrosion and wear in exterior door applications
• Package quantity of 24 units per case supports contractor and wholesale purchasing

Compatibility

Designed as an OEM-style replacement or new-installation door bottom seal for standard residential and light commercial single-door applications where a 36-inch aluminum door bottom is required.

Installation Notes

Installation is typically performed by general contractors, weatherization technicians, or experienced DIYers using basic hand tools including a drill, screwdriver, and hacksaw or tin snips for length adjustment if needed. The door should be removed or blocked open during fitting to allow accurate threshold clearance measurement. Seal compression against the threshold should be firm enough to close air gaps without creating excessive drag that stresses hinges or the door frame. Local energy codes and building standards may specify minimum weatherstripping requirements for exterior doors.