Duck Brand, 2.25 Inch X 2.25 Inch X 42 Inch Window Air Conditioner Insulating Seal, Noise Reducing
Duck Brand, 2.25 Inch X 2.25 Inch X 42 Inch Window Air Conditioner Insulating Seal, Noise Reducing
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Duck Brand, 2.25 Inch X 2.25 Inch X 42 Inch Window Air Conditioner Insulating Seal, Noise Reducing

|640 ratings

Key item features

  • Insulating Foam: This Duck Brand product is an insulating foam seal, specifically designed for use with window air conditioning units.
  • Precise Dimensions: The seal measures 2.25 inches by 2.25 inches by 42 inches, ideal for fitting between window A/C units and window frames.
  • Gap Closure: Effectively closes gaps between window A/C units and window frames, preventing outside air, dust, insects, and pollen from entering.
  • Noise Reduction: Helps reduce noise and vibration from window air conditioning units, contributing to a quieter indoor environment.
  • Easy Installation: Features an easy, adhesive-free installation, making it safe and suitable for renters, leaseholders, and temporary living spaces.
  • Climate Control: Aids in maintaining desired indoor temperatures by keeping cool air inside and warm air outside.
  • Product Identifiers: Identified by Model Number 284423, this insulating seal has an item weight of 0.140 LB.
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Specs

R-value, 0Weatherproofing window insulation kit type, Insulation FilmInsulation thickness, 2.25 inMaterial, FoamSize, 2.25" x 2.25" x 42"Rec. use, Window

About this item

Product details

Window air conditioning units can provide added comfort in the hot summer months, but can also create a gap that lets in outside air, dust, insects and pollen. Duck Brand Air Conditioner Insulating Seals are easy-to-install foam seals that close the gaps between the window A/C unit and window frame. In addition to keeping the cool air in and warm air out, they reduce noise and vibration while blocking unwanted dust, insects and pollen from entering your home. Use together with other Duck Brand weatherization products to make your home more comfortable and energy efficient all year long.
  • Insulating foam seal
  • Easy to install
  • Use with window A/C units
  • The AC insulating seal has no adhesive, making it safe for renters, leaseholders and temporary living spaces
  • Model Number: 284423
  • Item Weight: 0.140 LB
  • Brand: Duck
info:
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Specifications

R-value

0

Weatherproofing window insulation kit type

Insulation Film

Insulation thickness

2.25 in

Material

Foam

Warranty

Warranty information

Liability limited to replacement or refund of product cost. Call 1-800-321-0253 for details.

Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.

Customer ratings & reviews

4.6 out of 5 stars
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640 ratings208 reviews
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Showing 1-3 of 208 reviews

Sep 10, 2026
Reviewer name: Haywood
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Worked like a charm

Worked like a charm to seal my window.

Helpful?d0c608f0-bb16-11f1-819d-994bb3097ad717133817
Nov 6, 2026
Reviewer name: J
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Good quality, have been using for years. Purchased to replace some, that I reuse every winter, that went missing.

Helpful?d0c608f0-bb16-11f1-819d-994bb3097ad717133817
Nov 4, 2026
Reviewer name: WalmartCustomer
Item details
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Easy to cut and use for someone who has no idea how to use it

Incentivized Review
Helpful?d0c608f0-bb16-11f1-819d-994bb3097ad717133817
Current price is $4.36
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