M-d 43337 Cinch Slide-on Under Door Seal, Brown, 36 In.

The M-D 43337 Cinch Slide-On Under Door Seal is a vinyl weather seal designed to block drafts and air leaks at the base of doors. By compressing firmly in place under the door, this seal reduces energy loss from heating and cooling, helping lower utility costs while improving indoor comfort. It works for doors up to 1-3/4 inches thick and seals gaps up to 3/4 inch wide.

This door seal solves common problems caused by gaps under doors—cold drafts in winter, warm air escape in summer, and moisture infiltration. The slide-on design requires no screws, nails, or special tools, making it an easy upgrade for homeowners and renters seeking quick energy efficiency improvements.

Features and Benefits

• Compression Fit: Holds firmly in place under the door without fasteners, maintaining a tight seal over time.
• Easy Installation: Simply measure your door width, trim to length with a hacksaw, and slide the seal onto the door bottom—three simple steps.
• Vinyl Material: Made from durable vinyl construction for reliable performance.
• Door Compatibility: Fits doors up to 1-3/4 inches thick and up to 36 inches wide.
• Brown Color: Neutral brown finish blends with wood and painted doors, maintaining a neat appearance while sealing drafts.
• Seals Large Gaps: Closes gaps up to 3/4 inch, blocking drafts that standard weatherstripping may miss.

Specifications

• Brand: M-D
• Model: 43337
• Length: 36 inches
• Width: 2-1/4 inches
• Material: Vinyl
• Color: Brown
• Door Thickness: Fits doors up to 1-3/4 inches thick
• Maximum Gap Sealed: 3/4 inch

How to Use

Measure the width of your door, trim the seal to the correct length using a hacksaw, and slide it onto the bottom edge of the door. No fasteners or adhesive needed.