Thermwell UDB77W Door Sweep Draft Stop 36 Inches White

Product Description

The THERMWELL UDB77W is a slide-on door sweep and draft stop designed to seal the gap at the bottom of exterior and interior doors. It slides directly onto the door bottom without fasteners or adhesive, creating a barrier against drafts, dust, and insects. The UDB77W is sized at 36 inches in length and finished in white, fitting the door profile of most standard residential and light-commercial doors. The vinyl or flexible seal material works across all common floor surface types, including hardwood, tile, carpet, and concrete. Installation requires no tools and no drilling, making it a fast field fix during weatherization or energy-efficiency calls.

The UDB77W is suited for residential entry doors, utility room doors, garage passage doors, and similar applications where air infiltration or pest entry is a concern. It is designed to reduce energy loss by limiting conditioned air from escaping under the door gap. The cut-to-fit design allows the installer to trim the sweep to match door widths narrower than 36 inches. Property managers, general contractors, and HVAC technicians performing energy audits and weatherization work commonly specify this type of product.

Key Features

• Slide-on installation with no tools, screws, or adhesive required
• Cut-to-fit design accommodates door widths up to 36 inches
• Works on all floor surface types including carpet, hardwood, tile, and concrete
• Reduces conditioned air loss and drafts at the door base
• Provides a physical barrier against insects and dust infiltration
• White finish for standard door compatibility

Compatibility

Designed as a slide-on replacement or new-installation door sweep for most standard residential and light-commercial doors up to 36 inches wide.

Installation Notes

No power disconnect is required for installation. Slide the sweep onto the bottom of the door from the door face edge and adjust for a snug fit against the floor surface. If the door width is less than 36 inches, trim the sweep to length using a utility knife or tin snips before sliding it into position. Verify that the sweep does not create excessive drag that would impair door operation or damage flooring.