Thermwell V73/9H Shrink Window Kit 42x62 in 9 Pack

Product Description

The THERMWELL V73/9H is a 9-pack indoor window insulation kit designed to reduce drafts and heat loss through standard-size windows during cold-weather months. Each kit includes a crystal clear plastic sheet measuring 42 inches by 62 inches that shrinks tight and wrinkle-free when heated with an ordinary handheld hair dryer. Double-face tape is included for mounting. The result is a nearly invisible barrier that helps improve thermal performance without replacing glass or frames. This kit is a common solution used by weatherization contractors, facility maintenance staff, and informed homeowners working to reduce energy loss in residential and light commercial buildings.

The V73/9H is intended for use on standard-size interior window openings in residential and light commercial applications. The plastic sheet is compatible with metal frames, painted or varnished wood frames, and vinyl clad frames, making it suitable for a wide range of window types found in older homes, apartments, and commercial spaces where window replacement is not yet practical. The included double-face tape adheres directly to the frame surface for a secure, season-length hold.

Key Features

• Crystal clear plastic sheet provides an unobstructed view after shrinking
• Shrinks wrinkle-free using a standard handheld hair dryer — no special tools required
• Includes double-face tape for adhesion to metal, painted wood, varnished wood, or vinyl clad frames
• Each sheet measures 42 inches by 62 inches, sized for standard windows
• 9 sheets per package, suitable for multi-window weatherization jobs

Compatibility

Designed for use on standard-size interior windows with metal, painted wood, varnished wood, or vinyl clad frames.

Installation Notes

Installation is typically performed by weatherization technicians or general maintenance staff and requires no licensed trade credentials. Clean the window frame surface thoroughly before applying the double-face tape to ensure a secure bond. Apply the plastic sheet over the tape, then use a handheld hair dryer to shrink the film evenly from the center outward. Do not use an open-flame heat source or industrial heat gun, as excessive heat may damage the film or surrounding surfaces.