Thermwell M13WH V-flex Weather Strip 0.875x17 Ft White

Product Description

The THERMWELL M13WH is a V-Flex polypropylene weather strip designed to seal gaps around doors and windows against air infiltration, drafts, dust, and moisture intrusion. At 0.875 inches wide and 17 feet long, each roll provides enough material to seal multiple standard door or window frames in a single piece. The factory-applied adhesive backing eliminates the need for fasteners, making installation straightforward and clean. This weather strip is white in color and suited for light commercial and residential applications where a low-profile, flexible seal is required.

The M13WH is used in residential and light commercial settings to seal the perimeter of interior and exterior doors, sliding windows, and casement windows. Its V-Flex profile compresses under contact to conform to irregular surfaces and close uneven gaps. HVAC technicians, general contractors, and building maintenance professionals install this product as part of air sealing and weatherization work. It is also used by property managers performing routine door and window maintenance.

Key Features

• V-Flex profile compresses to seal irregular gaps along door and window frames
• Polypropylene construction resists moisture, mold, and routine wear
• Factory-applied adhesive back allows tool-free installation on clean, dry surfaces
• 0.875-inch width covers standard gap profiles on residential doors and windows
• 17-foot length per roll provides coverage for multiple openings per roll
• White finish blends with painted door and window trim

Compatibility

Designed as an OEM-style replacement and general-use weather strip for residential and light commercial door and window sealing applications.

Installation Notes

Installation is typically performed by HVAC technicians, general contractors, or maintenance professionals during weatherization or door and window service. Before applying, clean the mounting surface thoroughly and allow it to dry completely to ensure proper adhesive bond. Cut the strip to length with scissors or a utility knife. Do not stretch the strip during application, as this can reduce the effectiveness of the adhesive bond and alter the V-Flex profile geometry.