---
product_id: 1217137
title: "3M Indoor Window Insulation, Insulator Kit for 5 Windows 3ft x 5ft, Keeps Cold Air Out and Warm Air In, Includes Heat Shrink Window Film and Scotch Window Film Mounting Tape (2141W-6)"
brand: "3m"
price: "HK$211"
currency: HKD
in_stock: true
url: https://www.desertcart.hk/products/1217137-3m-indoor-window-insulation-insulator-kit-for-5-windows-3ft
store_origin: HK
region: Hong Kong
---

# Retains warm air Blocks cold drafts Easy DIY install 3M Indoor Window Insulation, Insulator Kit for 5 Windows 3ft x 5ft, Keeps Cold Air Out and Warm Air In, Includes Heat Shrink Window Film and Scotch Window Film Mounting Tape (2141W-6)

**Brand:** 3m
**Price:** HK$211
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 3M Indoor Window Insulation, Insulator Kit for 5 Windows 3ft x 5ft, Keeps Cold Air Out and Warm Air In, Includes Heat Shrink Window Film and Scotch Window Film Mounting Tape (2141W-6) by 3m
- **How much does it cost?** HK$211 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/1217137-3m-indoor-window-insulation-insulator-kit-for-5-windows-3ft)

## 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

- • **All-Season Secure Seal:** Scotch double-sided tape locks in warmth all winter long.
- • **Fast & Foolproof Setup:** Install in minutes with simple peel, stick, and heat steps.
- • **Fits 5 Standard Windows:** Covers five 3'x5' windows—perfect for modern homes.
- • **Slash Your Heating Bills:** Keep cozy and cut energy costs with airtight insulation.
- • **Crystal Clear, Wrinkle-Free View:** Heat-shrink film ensures a flawless, transparent finish.

## Overview

The 3M Indoor Window Insulation Kit includes heat-shrink film and Scotch double-sided mounting tape to insulate five 3'x5' indoor windows. Designed for quick, wrinkle-free installation, it reduces heating costs by blocking cold drafts and retaining warm air, while preventing condensation and frost buildup. Trusted 3M quality ensures a clear view and a secure, season-long seal.

## Description

Indoor Window Insulation, Insulator Kit for 5 Windows 3ft x 5ft, Keeps Cold Air Out and Warm Air In, Includes Heat Shrink Window Film and Scotch Window Film Mounting Tape (2141W-6)

## Features

- Saves energy and reduces heating costs
- Reduces condensation and prevents frost buildup
- Quick and easy installation
- Fits five 3'x 5' indoor windows
- 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 |
|---------------|-------|
| Manufacturer | 3M |
| UPC | 051131500242 |
| Part Number | 2141-EP |
| Item Weight | 10.4 ounces |
| Product Dimensions | 60 x 36 x 0.1 inches |
| Item model number | 2141W-6 |
| Is Discontinued By Manufacturer | No |
| Size | 5-Windows |
| Style | Indoor |
| Finish | Clearest window film |
| Pattern | Insulator Kit |
| Shape | shape |
| Item Package Quantity | 1 |
| Measurement System | inch |
| Coverage | 5' x 3' |
| Included Components | 1 Folded Film 2 Rolls of Tape 1 Instruction Sheet |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Warranty |

## Product Details

- **Material:** Plastic
- **Brand:** 3M
- **Item Thickness:** item_thickness.string_value Inches
- **Recommended Uses For Product:** Insulating indoor windows to save energy, reduce heating costs, and prevent frost buildup
- **Global Trade Identification Number:** 00051131500242, 05113150024217

## Images

![3M Indoor Window Insulation, Insulator Kit for 5 Windows 3ft x 5ft, Keeps Cold Air Out and Warm Air In, Includes Heat Shrink Window Film and Scotch Window Film Mounting Tape (2141W-6) - Image 1](https://m.media-amazon.com/images/I/818LKTgh1zL.jpg)

## Available Options

This product comes in different **Size** 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 5 Windows 3ft x 5ft, Keeps Cold Air Out and Warm Air In, Includes Heat Shrink Window Film and Scotch Window Film Mounting Tape (2141W-6)
- XFasten Transparent Window Weather Sealing Tape, 2-Inch x 30 Yards (50.8mm x 27.43m), Clear Window Draft Isolation Sealing Film Tape, No Residue
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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-09*