Duck Brand, 1.38 Inch X 0.5 Inch X 42 Inch Window Air Conditioner Insulating Seal, Noise Reducing
Duck Brand, 1.38 Inch X 0.5 Inch X 42 Inch Window Air Conditioner Insulating Seal, Noise Reducing
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Duck Brand, 1.38 Inch X 0.5 Inch X 42 Inch Window Air Conditioner Insulating Seal, Noise Reducing

588 ratings
Duck Brand, 1.38 Inch X 0.5 Inch X 42 Inch Window Air Conditioner Insulating Seal, Noise ReducingDuck 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 SizeSingle

Key item features

  • Core Dimensions: This Duck brand window air conditioner foam insulating seal is 1.38 inches wide, 0.5 inches thick, and 42 inches long. It weighs 0.050 LB (Model: 288764).
  • Weather-Tight Foam: Made from high-density foam, it creates a weather-tight seal around your AC unit. This effectively blocks both winter and summer drafts from entering your home.
  • Easy Customization: The seal is easy to cut for a custom fit on almost any A/C unit. Simply place it on the unit and lower the window to compress for installation.
  • Indoor Protection: Blocks outside air, dust, insects, and pollen from entering through AC gaps. It helps maintain comfort by keeping cool air in and warm air out, regulating indoor temperatures.
  • Quiet & Rent-Safe: Reduces AC noise and vibration. Its non-adhesive design makes it safe for renters, leaseholders, and temporary living spaces, ensuring no residue.
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Customer ratings & reviews

4.6 out of 5 stars
stars
588 ratings194 reviews
How item rating is calculated
  1. 5 stars79% (462)
  2. 4 stars12% (72)
  3. 3 stars4% (24)
  4. 2 stars2% (10)
  5. 1 star3% (20)

Reviews summary

Pros

  • : Requires little time and effort to set up.
  • : Provides cost-effective solution for sealing window air conditioner units.
  • : Fits snugly around various units and windows.
  • : Fit reduces vibration, rattling and wind sounds.
  • : The construction feels sturdy and well finished.
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Showing 1-3 of 194 reviews

Jun 16, 2026
Reviewer name: judi
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great choice

For clarity, there is no tape nor is assembly required. I only gave 1 star for each since neither applies. In the past I have purchased another brand. I was pleasantly surprised to find this was wider than the other brand - which, allows for better weather proofing. Very durable, easy to use, cuts easily with regular scissors. Blocks a lot if hot air from entering.

Helpful?1ca95790-6892-11f1-8dd0-9d3763a63fd7910495638
Feb 3, 2026
Reviewer name: LindaS
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
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?1ca95790-6892-11f1-8dd0-9d3763a63fd7910495638
Jun 24, 2026
Reviewer name: Jennifer
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Window air conditioner insulation

This works perfect for filling in the gaps when we put in our window air conditioner.

Helpful?1ca95790-6892-11f1-8dd0-9d3763a63fd7910495638
Current price is $5.13
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