---
product_id: 9529030
title: "Indoor Kit                   Covers One XL 6'8\" x 19.5' Window"
brand: "3m"
price: "S$25"
currency: SGD
in_stock: null
url: https://www.desertcart.sg/products/9529030-indoor-kit-covers-one-xl-68-x-19-5-window
store_origin: SG
region: Singapore
---

# Retains indoor warmth Blocks cold drafts Easy DIY install Indoor Kit                   Covers One XL 6'8" x 19.5' Window

**Brand:** 3m
**Price:** S$25
**Availability:** ❌ Out of Stock

## Summary

> ❄️🔥 Seal the cold out, keep the cozy in — winter-proof your space like a pro!

## Quick Answers

- **What is this?** Indoor Kit                   Covers One XL 6'8" x 19.5' Window by 3m
- **How much does it cost?** S$25 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/9529030-indoor-kit-covers-one-xl-68-x-19-5-window)

## Best For

- 3m enthusiasts

## Why This Product

- Trusted 3m brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **DIY Friendly, No Fuss:** Quick install with simple tools—perfect for busy pros.
- • **All-Season Secure Seal:** Double-sided Scotch tape ensures airtight, long-lasting hold.
- • **Slash Your Heating Bills:** Energy-saving film locks in warmth and cuts costs.
- • **Condensation & Frost Fighter:** Prevents moisture buildup for clearer, healthier windows.
- • **Crystal Clear, Wrinkle-Free View:** Heat-shrink film creates a flawless, transparent barrier.

## Overview

The 3M Indoor Window Insulation Kit fits one oversized window (6'8" x 19.5'), combining heat-shrink film and double-sided Scotch mounting tape to create an airtight barrier that reduces heating costs, blocks cold drafts, and prevents condensation. Designed for easy installation and a crystal-clear finish, this kit is a smart, energy-efficient upgrade for any modern home.

## Description

Indoor Window Insulation, Insulator Kit for 1 Window 6'-8" x 19.5' ft, Keeps Cold Air Out and Warm Air In, Includes Heat Shrink Window Film and Scotch Window Film Mounting Tape (2149W-6)

## Features

- Saves energy and reduces heating costs
- Reduces condensation and prevents frost buildup
- Quick and easy installation
- Fits one XL 6'8" x 19.5' indoor window
- 1 year Limited Warranty: This 3M product will be free from defects in material and manufacture. If this product is defective, your exclusive remedy shall be, at 3M's option, replacement of the product or refund of the purchase price.Limitation of Liability: 3M will not be liable for any loss or damage arising from this product, whether direct, indirect, special, incidental or consequential

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Global Trade Identification Number | 00051131588615 |
| Manufacturer | 3M |
| UPC | 051131588615 |
| Part Number | 2149W-6 |
| Item Weight | 14 ounces |
| Product Dimensions | 84 x 237 x 0.1 inches |
| Item model number | 2149W |
| Is Discontinued By Manufacturer | No |
| Size | 1 Oversized Window |
| Color | Clear |
| Style | 1 Oversized Window |
| Pattern | Insulator Kit |
| Shape | shape |
| Item Package Quantity | 1 |
| Coverage | 135.57 square feet |
| Included Components | Insulation kit |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Warranty |

## Product Details

- **Material:** Plastic
- **Brand:** 3M
- **Item Thickness:** 0.07 Inches
- **Recommended Uses For Product:** thermal insulation
- **Product Dimensions:** 84"L x 237"W

## Images

![Indoor Kit                   Covers One XL 6'8" x 19.5' Window - Image 1](https://m.media-amazon.com/images/I/619ynX6ERPL.jpg)

## Available Options

This product comes in different **Number of Items** options.

## Questions & Answers

**Q: Will this work for insulating from the heat of a hot climate too?**
A: I would assume so, though we live in Maine near the coast where it can be in the teens and 20s sometimesduring the weather; I assume it would work since 3M is an excellent product - the hardware versionsdon't seem to work as well. You'll need the 3M tape for this as well.

**Q: Has anyone had success applying this to a window without trim? Our 50s track house just has drywall-cased windows.**
A: I want an answer to this too! I also have the drywall-cased windows from the 50s. Thanks!!

**Q: I am from the South, so my big question is, does it insulates from heat so well as it does from cold? 
Will it last if you leave it permanently, or you need to replace it every year?
Third question would be, can you glue it against dry wall?
Thanks**
A: Old query, but for newbies: this would work as well to keep the A/C air away from the window pane, thus it would insulate heat as well as cold. It's just physics. It forms a dead air space just like a storm window (if you know what those are up north). You could leave it on, but probably would not last permanently. I don't see how you could use glue; it is intended to be mounted only with the double stick tape provided in the box. Browse other replies who have said that they applied it directly to dry wall (sheet rock).
BTW another response said:  “Yes but you can run into a moisture issue. We tried it and it it worked well except that the A/C created condensation on the plastic which eventually pooled up between the window and the plastic creating mold”

**Q: How does this hold up compared to frost king?**
A: This holds up much better then frost king... I have never had frost king last a whole season on my windows but the 3M lasts no matter how long the cold season has lasted.  I will never go back to using Frost King again.

## Frequently Bought Together

- 3M Indoor Window Insulation, Insulator Kit for 1 Window 6'-8" x 19.5' ft, Keeps Cold Air Out and Warm Air In, Includes Heat Shrink Window Film and Scotch Window Film Mounting Tape (2149W-6)
- 3M Window Film Mounting Tape, 1/2" in x 13.8 yd Roll, For Use with 3M Window Insulator Kits, Use on Painted Wood, Aluminum, and Vinyl-Clad Molding and More, Indoor Use, Easy to Apply (2145C)
- 3M 2141W-6 Interior Shrink Film Window Kit

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-03*