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Deal.ai › Frost King › Air Conditioners
Frost King
Frost King flexible vinyl window air conditioner side

Frost King flexible vinyl window air conditioner side

4.5(21 ratings)

Best price now

$16.99at The Home DepotChecked 1 h ago

Compared across 3 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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Price facts

  • Lowest price today: $16.99 at The Home Depot (checked Nov 10, 2026).
  • Checked at 3 stores.

Our take on the Frost King flexible vinyl window air conditioner side

These are two self-adhesive foam panels that seal the gap between a window air conditioner and the window frame. The urethane foam blocks outside air, noise and vibration better than the thin plastic wings that come in most AC boxes. They suit anyone with a window unit whose original side panels are cracked, missing or drafty. Compared with generic accordion panels, the foam is thicker and quieter but less rigid and not a universal fit, so measure your opening first.

Best forReplacing cracked or missing AC side panelsCutting drafts and street noise around a window unitRenters who want a no-drill sealOlder window ACs with worn plastic wings
Pros
  • Thick urethane foam seals air gaps better than stock plastic panels
  • Self-adhesive backing sticks to the frame and the unit
  • Dampens vibration and outside noise
  • Two panels per pack cover both sides of one unit
  • Trims with a knife for a custom fit
Cons
  • Not a universal fit; openings wider than about 12 inches per side need something else
  • Foam can tear if repositioned after sticking
  • Less rigid than plastic accordion panels
  • Adhesive may not hold on dirty or damp frames

Frost King flexible vinyl window air conditioner side prices at every store

  • The Home DepotNew

    In stock

    $16.99Checked 1 h ago
    Visit The Home Depot
  • Lowe'sNew

    In stock

    $16.99Checked 1 h ago
    Visit Lowe's
  • WalmartNew

    In stockSold by SIM Supply IncReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $26.39+ $5.99 shippingChecked 1 h ago
    Visit Walmart

Store links may earn us a commission. Some prices via Klarna.

Frost King flexible vinyl window air conditioner side price history

Lowest price we've seen: $16.99 on Nov 10 at The Home Depot. Tracked across 2 stores since Nov 10.

What reviewers say

  • 4.5 / 521 ratings

Buyers rate these panels well, mostly for sealing drafts and quieting older window units. Complaints center on fit and the adhesive letting go on some frames.

What people mention
  • Draft sealingPraisedOwners say the foam stops cold air leaking around the unit.
  • NoisePraisedSeveral mention the room is quieter with the panels in place.
  • FitMixedWorks well on standard windows but too small for wide openings.
  • AdhesiveCriticisedSome buyers report the backing peeling off after a few weeks.
  • InstallationPraisedEasy to trim and stick, no tools needed.

About the Frost King flexible vinyl window air conditioner side

This Frost King flexible vinyl is made to replace the worn out side panels from you window air conditioning unit. Insulating side panel kit for use with window air conditioners - measurements are 21 inches high with an expandable width of up to 12 inches.

Specifications

Panel dimensions
18" x 9" x 7/8"Source
Panel count
2 PanelsSource
Color
GreySource
Material
Urethane FoamSource
Overall height

Questions and answers

Will these fit my window air conditioner?
They fit most standard window units where each side gap is up to about 12 inches wide and the height is around 18 to 21 inches. Measure your opening before buying; wide windows need a different kit.
Can I cut the panels to size?
Yes. The foam trims easily with a utility knife or scissors. Cut slightly oversize and test-fit before peeling the backing.
Do they replace the plastic panels that came with the AC?
They can. Many buyers use them in place of worn or missing plastic wings, or add them alongside the stock panels for a tighter seal.
Will they reduce noise from outside?
They help. The foam blocks some street noise and vibration, but it is not soundproofing; loud traffic will still be audible.
How many panels come in a pack?
Two panels, enough for both sides of one window unit.
Can I reuse them next season?
Usually not. The adhesive is meant for one install, and the foam tends to tear when pulled off.
Where is the Frost King flexible vinyl window air conditioner side cheapest?
At The Home Depot, for $16.99, as of our latest check.
What do buyers say about the Frost King flexible vinyl window air conditioner side?
Rated 4.5 out of 5 from 21 ratings.
Where can I buy the Frost King flexible vinyl window air conditioner side?
3 stores we checked sell it, including The Home Depot, Lowe's, Walmart.

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Buying guides that pick the Frost King flexible vinyl window air conditioner side

  • Best insulated side panels for window air conditioners

Stores we've priced the Frost King flexible vinyl window air conditioner side at

  • Home Depot deals and prices
  • Lowe's deals and prices

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All Frost King deals and products →
18 inSource
Overall width
9 inSource
Thickness
7/8 inSource
Features
Self-AdhesiveSource
Includes
(2) PanelsSource
Protects against
Noise; VibrationsSource
Compatible product type
Window Air ConditionerSource