Can this be used indoors?

We would not recommend this for use indoors. Instead we would suggest the 3M Indoor Insulator Film Mounting Tape.

Why would you choose the exterior version over the interior version? Trying to choose between the two.

The name pretty much sums it up. You'd choose the exterior version for exterior use...

What is the difference between the outdoor and indoor ones?

The adhesive tape is designed to be weatherproof.

I am getting the patio door size. How thick is the plastic? Is it 4Mil or 5Mil

The plastic is .75 mil in thickness. It is stated on the box.

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3M Outdoor Window Insulator Kit, 2-Window

3M Outdoor Window Insulator Kit, 2-Window

Product ID: 409047132

Details

Brand
3M
Item Thickness
0.75 Mils
Material
Plastic
Product Dimensions
2.13L x 1.57W

💡Energy-saving insulation

❄️Blocks cold drafts

🛠️Quick, easy install

Description

❄️ Stay warm, save smart — winter-proof your windows with 3M!

SEAL OUT THE CHILL - Advanced heat shrink film locks in warmth and blocks cold air.
CRYSTAL CLEAR COMFORT - Ultra-clear film reduces condensation and frost buildup for a pristine view.
EFFORTLESS WINTER PREP - Quick, no-fuss installation with double-sided Scotch mounting tape.
TAILORED FIT FOR YOUR HOME - Covers two large 3'x5' outdoor windows, perfect for modern living spaces.
ENERGY BILLS MEET YOUR MATCH - Cut heating costs with superior insulation that pays for itself.

The 3M Outdoor Window Insulator Kit is a premium solution designed to keep cold drafts out and warm air in by using clear heat shrink film and double-sided Scotch mounting tape. Ideal for two 3'x5' outdoor windows, it reduces heating costs, prevents frost buildup, and minimizes condensation. Easy to install and durable throughout the season, this kit is a smart energy-saving upgrade for any home facing cold weather.

Specifications

ASIN	B0045ZT17Y
Best Sellers Rank	#48,062 in Home Improvement ( See Top 100 in Home Improvement ) #443 in Weather Stripping
Brand Name	3M
Country of Publication	USA
Coverage	Two 3'x5' outdoor windows
Customer Reviews	4.1 4.1 out of 5 stars (1,711)
Global Trade Identification Number	00051141323848
Included Components	3M Outdoor Window Insulator Kit, 2-Window
Item Dimensions L x W	2.13L x 1.57W Meters
Item Thickness	0.75 Mils
Item Type Name	3M Outdoor Window Insulation Kit
Item Weight	0.28 Pounds
Manufacturer	3M CHIMD
Manufacturer Part Number	2170W-6
Material Type	Plastic
Model Number	2170 W-6
Number of Items	1
Number of Packs	1
Recommended Uses For Product	Insulating windows, reducing heating costs, and preventing frost build-up on outdoor windows of various sizes
UPC	051141323848
Unit Count	1.0 Count

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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