Will this actually quiet my outdoor AC unit?

It can soften vibration and rattle at contact points, but it is thin foam and will not silence a loud compressor. Fix loose mounts and panels first for the biggest gain.

Yes. The foam is flexible and can be trimmed with scissors or a knife to fit brackets, feet and curved panels.

Does the adhesive stick to metal?

It bonds best to clean, dry, smooth metal. Wipe off dust and oil first, and avoid applying it to wet or greasy surfaces.

Is it for indoor or outdoor units?

It is described for both indoor and outdoor air conditioning units, and the foam is meant to hold up under normal operating temperature changes.

How many pads come in the pack?

Two pads are included, each about 9.8 by 21.6 inches and 1.2 inches thick.

Forestwhale Self-Adhesive Polyurethane Foam Pad 9.8 x 21.6 x 1.2 in, 2 Pcs

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$11.19at WalmartChecked Nov 4

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Forestwhale Self-Adhesive Polyurethane Foam Pad 9.8 x 21.6 x 1.2 in, 2 Pcs

Best price now

$11.19at WalmartChecked Nov 4

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $11.19 at Walmart on Nov 4.

Our take on the Forestwhale Self-Adhesive Polyurethane Foam Pad 9.8 x 21.6 x 1.2 in, 2 Pcs

This is a two-piece sheet of dense, corrugated polyurethane foam with a self-adhesive backing, sized for air conditioner compressor units. The corrugation and foam structure are meant to dampen vibration and absorb sound while adding a layer of thermal insulation. It is a low-cost accessory for anyone bothered by a rattling or humming outdoor unit or wanting to cushion contact points. It is not a precision acoustic panel, so expect modest noise reduction rather than silence.

Best forHomeowners with a noisy outdoor AC compressorCushioning vibration where a unit meets a wall or bracketAdding a light insulation layer to indoor or outdoor AC unitsDIY installers who want peel-and-stick foam

Pros

Self-adhesive backing for quick attachment
Corrugated foam helps dampen vibration and absorb sound
Flexible enough to fit curved and flat surfaces
Lightweight and easy to cut to size
Two pads per pack cover more than one contact area

Cons

Foam is thin, so noise and vibration reduction is limited
Adhesive may not hold on dusty, oily or wet surfaces
Not a structural pad; it will not fix a badly mounted unit
Color and finish may vary slightly from the listing image