Udderly Quiet™ Class A™ Anechoic Acoustic Foam 4″ Gray (Case of 4)

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Udderly Quiet™ Class A™ Anechoic Acoustic Foam 4″ Gray (Case of 4)

The Udderly Quiet™ Anechoic Acoustic Foam gives you all the same benefits as traditional polyurethane foams but with a Class A™ flammability rating. Soundproof Cow’s innovative solutions feature open-acoustic melamine materials that stand strong against heat sources. If you want to eliminate echoing in vast open spaces, these 2 ft. x 4 ft. foam pads can help you keep your sounds true.

Anechoic acoustic foams are effective for limiting reverberations caused by high- and low-pitch frequencies. Those building professional music studios, broadcasting stations, venues and commercial buildings with heavy equipment often turn to our Class A™ Anechoic Acoustic Foam, as these melamine-based products can handle constant temperatures up to 320 degrees Fahrenheit. Even when guitar amps emit excess heat or computer components run hot, Soundproof Cow’s 4-inch-thick foams keep their shape for consistent performance.

Limit audible distractions in your professional environment with this four-pack of anechoic acoustic foam sheets and enjoy easy installation using PL® Construction Adhesive.

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Weight 16 lbs
Dimensions 2 ft. x 4 ft.
Thickness 4 in.
Coverage 32 sqft. (8 sqft./sheet)
Quantity Case of 4
Color Gray
NRC Rating 1.25
Fire Rating Class A™
Availability Usually ships in 7-14 business days


Harsh noises, reverberations, heavy bass and echoes can ruin your acoustics. If you are trying to record music, deliver a podcast, give a speech or put on a performance, the last thing you need is sound interference. However, it’s not always possible to find a venue with the right acoustics, which is why quality soundproofing materials are so important.

Soundproof Cow, which leads the way in soundproofing solutions, has done it again with our Udderly Quiet™ Class A™ 4” Gray Anechoic Acoustic Foam. What makes these 4” gray anechoic foam panels so special is that they provide all the soundproofing power you have come to expect from our standard polyurethane foam panels, as well as extreme heat- and flame-resistance.

The problem with ordinary polyurethane panels is that polyurethane can ignite when subjected to sparks, open flame or high heat.  It is resistant enough not to combust under ordinary conditions where it is not subjected to flame, and meet local building fire codes for exposed materials that may not allow polyurethane soundproofing foam.

Our Class A™ gray anechoic acoustic foam is made of an open-celled acoustic melamine. This is a Class A-rated substance that will not combust from random sparks and can stand temperatures as high as 482 degrees Fahrenheit, with a constant temperature tolerance as high as 320 degrees Fahrenheit.

At 4” thick, these panels deliver maximum soundproofing power, so you can feel free to use them in your most challenging noise environments. The neutral gray color and intriguing 3D double convoluted design allow them to blend in with a wide range of decors, and with four to a case, you can cover 32 square feet per case with these 2’ x 4’ panels.

We ship within one to two weeks, so if you order now, you can start your soundproofing very quickly. Installation should not take long, as it requires only basic tools and construction adhesive.

Make sure you have both the sound protection and Class A flame protection you need by ordering Udderly Quiet™ Class A™ 4” Gray Anechoic Acoustic Foam now.



Engineered for performance — The Anechoic pattern was designed to increase surface area, ultimately increasing the acoustic performance. Udderly Quiet™ Class A™ Anechoic Acoustic Foam absorbs sound generated at low, mid and high frequencies and have an equal to or higher Noise Reduction Coefficient (NRC) then polyurethane anechoic products.

Quality — Udderly Quiet™ Class A™ Anechoic Acoustic Foams are made with high quality melamine foam. This foam is consistent in density and firmness so acoustic performance will also be consistent.

Ease of Installation — Udderly Quiet™ Class A™ Anechoic Acoustic Foams are light weight and can be attached to a variety of surfaces. No special tools or materials are needed.

Personalization — Udderly Quiet™ Class A™ Anechoic Acoustic Foams are available in bright white and light gray.

Architectural Interest — The 3D, double convoluted pattern of the Udderly Quiet™ Class A™ Anechoic Acoustic Foams creates a visually unique environment.

Flammability — Udderly Quiet™ Class A™ Anechoic Acoustic Foams are manufactured from melamine foam that has a Class A™ flammability rating. This product passes most building code flammability requirements for exposed materials.

Not just for Professional Studios — Udderly Quiet™ Class A™ Anechoic Acoustic Foams can be used almost anywhere reverberation (echo) is an issue and heat or potential sparks are a concern. This product is heat resistant to 482º F and is able to withstand constant temperatures up to 320º F.

Product Availability


  • 24 in. x 48 in.
  • 48 in. x 48 in.
  • 48 in. x 96 in.

Need a thickness or size not listed above? Custom thicknesses and sizes are available, please call 1-866-949-9COW for details.



  • Auditoriums
  • Broadcast studios
  • Clean Rooms
  • Computer
  • Equipment Enclosures
  • Equipment Rooms
  • Gymnasiums
  • Gun Ranges
  • Home Recording Studios
  • Home Theaters
  • Industrial Facilities
  • Medical Facilities
  • Professional Theaters
  • Professional Recording Studios
  • Warehousing facilities


FREQUENCY 125 250 500 1K 2K 4K NRC*
4 INCH .33 1.12 1.32 1.39 1.19 1.12 1.25

* NRC = noise reduction coefficient

Customer Reviews

Average Customer Ratings: 4.8 (34 reviews)

The times I talked with you on the telephone and corresponded through email you have been very helpful and efficient. I would highly recommend Soundproofcow.com to anyone!

– S. Cimino, PA

I have emailed a lot of different manufactures and I have to say your customer service is head and shoulders above all of them. I emailed your company at about 9pm my time and when I woke up the next morning you had already answered my question and then the follow up was a few hours later. I am impressed. Thanks a lot for the quick turn around!

– E. Gustafson, NV

I just wanted to send a quick thank you for your rapid response and helpfulness. I very much appreciated it. You have been responsive in every way all through the process. It has been a pleasure doing business with you and your company.

– T. Alexander, CA

I just wanted to let you know that in the end, sealing the air spaces on this door worked just fine and took care of the problem.

I really appreciate you taking so much time to share your expertise with me, and in particular recommending I try the simpler solution before investing in more expensive noise barriers. That is a big credit to you and your business.

– Mike

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