Duck Window Air Conditioner Foam Insulating Seal, 1.38 in. x .5 in. x 42 in.
Duck Window Air Conditioner Foam Insulating Seal, 1.38 in. x .5 in. x 42 in.
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Duck Window Air Conditioner Foam Insulating Seal, 1.38 in. x .5 in. x 42 in.

4.6 stars out of 501 reviews
(4.6)|
501 ratings
Duck Window Air Conditioner Foam Insulating Seal, 1.38 in. x .5 in. x 42 in.Duck Window Air Conditioner Foam Insulating Seal 1 38 in x 5 in x 42 in2 pack Duck Window Air Conditioner Foam Insulating Seal 1 38 in x 5 in x 42 in
Pack Size:Single

Key item features

  • Unit Placement: Designed to be placed on top of an air conditioning unit, allowing the window to compress the seal for installation.
  • Customizable Fit: Easy to cut and use, this seal can be adapted to fit nearly any air conditioning unit.
  • Draft Prevention: Creates a weather-tight seal around the air conditioner, effectively preventing both winter and summer drafts from entering the home.
  • Multi-Benefit Barrier: Helps to keep cool air in and warm air out, while also reducing noise and vibration.
  • Environmental Shield: Blocks unwanted dust, insects, and pollen from entering the living space.
  • High-Density Material: Constructed from high-density foam, ensuring effective insulation and sealing properties.
  • Product Dimensions: Measures 1.38 inches in width, 0.5 inches in thickness, and 42 inches in length.
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Current price is $5.13
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Customer ratings & reviews

4.6 out of 5 stars
stars501 ratings217 reviews
How item rating is calculated
  1. 5 stars80% (399)
  2. 4 stars13% (63)
  3. 3 stars3% (16)
  4. 2 stars1% (7)
  5. 1 star3% (16)

Reviews summary

Pros

  • : Offers cost-effective solution for sealing gaps.
  • : Simple installation and operation.
  • : Quick setup with minimal effort.
  • : Made of thick material that effectively seals air gaps.
  • : Forms a precise seal around the ac unit.

Neutral

  • : Can be effective at blocking hot air, but may have seal inconsistencies.
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Showing 1-3 of 217 reviews

Feb 3, 2026
LindaS
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Good product

The foam around my a.c. Stopped the draft immediately and the cover worked great to protect my unit and seal the window from the cold weather in Northeast WI. I've never left my unit in the window and this product secured it well from winter's bite.

Helpful?89821f50-0b0e-11f1-85c1-b9be452911c7910495638
Apr 9, 2026
NKDA
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Easily can be cut to size so it fits around and insulates a window air conditioner.

Helpful?89821f50-0b0e-11f1-85c1-b9be452911c7910495638
Mar 27, 2026
Larry
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

very good product installed easy.

Helpful?89821f50-0b0e-11f1-85c1-b9be452911c7910495638