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Product Type	Indoor Window Insulator Kit
Window Size	XL – Fits 6'8" x 19.5' (Oversized)
Film Size	7' x 19.7' x 0.75 mil
Tape Included	1/2" x 27.7 yd
Coverage	1 Window

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Indoor Window Insulator Kit – Oversized Window with Heat-Shrink Film & Scotch® Mounting Tape

The 3M™ Indoor Window Insulator Kit 2149W-6 is designed to keep cold drafts out and warm air in, helping reduce heating costs throughout the winter season. Featuring crystal-clear heat-shrink film and Scotch® Window Film Mounting Tape, this kit provides a transparent, wrinkle-free seal that stays in place all season long. The film can increase the R-value of a single pane of glass by up to 90%, while preventing condensation and frost buildup. Quick and easy to install with just a hair dryer, the kit fits one extra-large 6'8" x 19.5' indoor window and is backed by a 1-year limited warranty for dependable home energy savings.

Top Features

Energy Saving Insulation: Increases the R-value of single-pane glass by up to 90%, helping reduce winter heating costs.
Crystal-Clear Heat-Shrink Film: Shrinks tight with a hair dryer for a transparent, wrinkle-free finish.
Scotch® Window Film Mounting Tape: Double-sided tape creates an airtight seal between film and surface.
Prevents Condensation & Frost: Stops cold drafts and reduces moisture buildup on glass.
Quick & Easy Installation: Designed for one XL 6'8" x 19.5' window with simple DIY application.

Category	Specification
Product Performance
Type	Indoor Window Insulator Kit
Insulation Method	Heat-Shrink Window Film + Double-Sided Mounting Tape
Energy Efficiency	Increases single-pane R-value by up to 90%
Benefits	Reduces heating costs, condensation & frost buildup
Application	Indoor Use Only
Kit Contents
Window Film Size	7 ft x 19.7 ft x 0.75 mil
Mounting Tape	Scotch® Window Film Tape, 1/2 in x 27.7 yd
Window Coverage	1 Window – XL 6'8" x 19.5' (Oversized)
Installation
Installation Difficulty	Easy – DIY Friendly
Tools Required	Hair Dryer (for shrink-fit application)
Finish	Transparent, Wrinkle-Free
Identifiers and Compliance
3M Part Number	2149W-6
3M ID	7100075770
UPC	051131588615
GTIN-13 / EAN	00051131588615
Country of Origin	Made in the USA with globally sourced materials
Warranty	1-Year Limited

This 3M™ Indoor Window Insulator Kit is backed by a 1-year limited warranty: 3M will replace the product or refund the purchase price if it is found defective in material or manufacture. Proudly made in the USA with globally sourced materials.

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In The Box

1 Roll of 3M™ Heat-Shrink Window Film (7 ft x 19.7 ft x 0.75 mil)
1 Roll of Scotch® Window Film Mounting Tape (1/2 in x 27.7 yd)
1 Instruction Sheet

Info & Guides

3M™ Indoor Window Insulator Kit - Oversized Window, 2149W-6, X Large Window