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B-Stock Flat Rate Box 16 sqft - 20 Sheets (12" x 10" each) - Butyl Vibration Sheets CLD

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Product Description


*** This Flat Rate Box Only Ships In The USA, and is NOT available for International shipping. For an International shipping quote please email us at 

  B-Stock Flat Rate Box contains 16 SqFt. They are made of the same materials as Damplifier/Damplifier Pro. B-Stock packs may have factory errors such as uneven edges, wrinkles, and/or thickness variances of +/- 25%. These defects are primarily cosmetic and should not effect the over all performance. Please be aware there is only a limited supply of B-Stock.

Damplifier and Damplifier Pro B-Stock - CLD Sound Deadener & Vibration Damper

B-Stock Damplifier/Damplifier Pro are self adhesive, foil backed CLD vibration dampers. Simply cut, peel & stick on any sheet metal/fiberglass to greatly reduce vibrations & structure borne noise.

The B-Stock Versions of our highly acclaimed Damplifier and Damplifier Pro still have many of the key features that make them very effective:

Foil - Our black foil is thicker than most of our competitors'! 
B-Stock Damplifier and Damplifier Pro have an ultra thick foil, which is thicker & stronger than the most popular selling CLD vibration damping mat on the market. Thicker foil means better sound deadening & vibration control as well as better heat dissipation. This is one of the most important features making Damplifier/Damplifier pro very effective.  Combined with:

Highest Quality USA made Butyl Rubber 
B-Stock Damplifier and Damplifier Pro utilize more rubber and less mineral fillers then most competing products. This means you get the best vibration damping and noise reduction products available! 

**B Stock product sold as-is, no refunds or exchanges**

**Always use caution when handling Damplifier products the foil edges are very sharp**

Noise Reduction Uses...

Whether you are looking to quiet down your street rod, or make your daily driver comfortable as a luxury car, B-Stock Damplifier and Damplifier Pro are an affordable and effective alternative to the A-Stock.

The first acoustical problem in any sound deadening project is structure borne noise This is the harmonics and resonance that is emitted from the cars sheet metal panels, similar to a wind chime. Unlike wind chimes however, our cars are not tuned to any specific musical frequency, so what we end up hearing is the road noise, engine rumble and exhaust drone.

Stopping the vibrations on your cars metal panels is much like stopping a noisy wind chime with your hand. Once the vibrations stop, the structure borne noise stops.

Traditional noise mats are mostly inefficient mass loaders; heavy & foul smelling tar boards that work by adding weight to the cars metal to quiet it down. This technology is over 50 years old, and for some reasons, is still being promoted by many of our competitors.

Damplifier Pro is not a mass loader or a heavy tar board. It is a constraint layer viscoelastic damper that converts the vibrational energy in to low level heat. This conversion of energy makes it 300% more efficient than traditional mass loading tar boards and asphalt mats while weighing half as much! Simply cut, peel and stick B-Stock Damplifier or Damplifier Pro to the interior sheet metal of your car to block out unwanted structure borne noise!

Mobile Audio

If you have an aftermarket sound system, then you know that a lot of the musical energy is spent, and even wasted by vibrating and flexing the your cars metal panels. Not only are these vibrations loud and obnoxious, but they also limit the potential of your stereo.

B-Stock Damplifier and Damplifier Pro will help improve your audio system in several ways: First, and perhaps most obvious, it will kill the vibrations, which will reduce panel distortion and strengthen the area around the speakers. Less vibrations means less unwanted noise and a more stable environment for the speakers to perform in.

Second, it will increase the volume of your music by keeping the acoustical energy in the car rather than letting it escape through the vibrating panels. Volume inside the car increases while nasty panel resonance outside the car is eliminated.

And finally, Damplifier Pro can improve your audio system by reducing unwanted ambient noise like road noise, engine noise & exhaust drone. When you can quiet down the rest of the car, the stereo has less sonic real estate to fight for, and the perceived volume increases.

To fully reduce road, engine and exhaust noise, we suggest the use of a noise barrier like Luxury Liner Pro on top of your B-Stock Damplifier or Damplifier Pro.

Thermal Insulation

B-Stock Damplifier and Damplifier Pro are not only incredible sound deadening mats, but they also act as one mean thermal insulator. The ultra thick foil and high quality butyl rubber on B-Stock Damplifier and Damplifier Pro offers three thermal insulation benefits.

First, the foil acts as a radiant barrier, reflecting heat back towards the source. When used on the firewall, this reduces the amount of heat making it in to the cabin of the car. Less heat means cooler temperatures. Pretty simple.

Second, the foil heat shield on B-Stock Damplifier and Damplifier Pro dissipates heat by increasing the surface area, allowing for thermal dissipation and reduction. Third, the butyl layer slows down any remaining heat on its way in to the cabin of the car. The longer it takes the heat to get to you, the easier it is for your air conditioning to counter it, and the more comfortable you are.

B-Stock Damplifier and Damplifier Pro are thermal insulators much like a coffee thermos. If you put hot liquid in the thermos, it stays hot for longer. If you put ice water inside, the ice takes longer to melt.

This is basically what B-Stock Damplifier and Damplifier Pro can do for your car. With a couple layers of Damplifier Pro installed, the outside environment has less effect on the internal temperatures of the car. For the next level of thermal insulation and heat control, add a layer of Heatwave or Heatwave Pro on top of your final layer of Damplifier Pro.

If you want the ultimate in heat rejection, add a layer of Luxury Liner Pro on top of your final layer of Damplifier Pro


What is the difference between Damplifier Pro and Damplifier CLD vibration damping mats??
Damplifier and Damplifier Pro are the same basic automotive CLD sound deadener mats in terms of product quality, but Damplifier Pro has a total thickness that is twice as thick as our regular automotive vibration mat Damplifier.
The foil on both of our automotive sound deadeners is the same; both 6.5 mils thick. The only difference between the two products is the total thickness of the adhesive.

What makes your automotive sound deadening mat Damplifier, different from asphalt roofing products or sound deadeners that come rolled up?
We only produce automotive sound damping mats that are designed for cars. Unlike roofing tapes, or other products that come on rolls, our automotive sound deadeners mats use only butyl binders with no asphalt filler. Our vibration dampers are odorless, non toxic & designed by expert adhesive formulators to reduce automotive noise and vibrations, not by roofing tape companies.

The foil on our CLD damping mat Damplifier is more than 3 times as thick than that of most roofing products and it will never melt off or cause you any headache.

How much CLD sound deadening do I need to use in my car to properly sound deaden the vibrations?
When it comes to automotive sound deadener and CLD vibration damping mats. more is always better, to a certain point. Covering the flat panels of your cars interior sheet metal panels with as little as 25 percent will help reduce harmonic distortion in the cars sheet metal, however in many cases, as much as 50 or 100 percent  CLD sound deadening coverage might be required, depending on the intensity of the audio system or how loud the road noise, engine noise and exhaust drone is. 
Applying a MLV noise barrier like our Luxury Liner or Luxury Liner Pro on top of your CLD sound deadener will more that tripple the sound deadening results from your CLD Damplifier application.

Why does Damplifier Pro not come on a roll like your less expensive Sound deadening competition mats do?
Here is an industry secret. Products that come on rolls are roof tapes relabeled as CLD sound deadener mats. There is not a sound deadening manufacturer in the industry that puts CLD constraint layer dampers on a roll. Real sound deadening vibration damper mats will always come in sheets. If it is on a roll, it is not designed as a sound deadener. It came from a roofing manufacturer and was not designed to dampen vibrations in a car. There is no exception to this rule.


  • 6.5 mil foil -BLACK
  • Varying thickness: Damp Pro Option is 2mm +/- 25%(on average) Damplifier Option is 1mm +/- 25%(on average)
  • Adhesive = Viscoelastic butyl rubber - 99.94% solids content
  • Sheet dimensions: Pro: 12" x 10" (.83 SqFt.) 
  • High temperature butyl adhesive with increased elastomeric properties
  • Higher rubber content - Less filler content = better performance
When it comes to automotive vibration damping and sound deadening, Second Skin Damplifier is the best automotive CLD (constraint layer damper) in its class. No other CLD vehicle sound deadener is as affordable as Second Skin Damplifier. No other automotive sound deadener competes at this price point, and no other noise damping CLD mat to date, has a more proven track record  for sound & noise reduction in automobiles!

Product Videos

Second Skin Damplifier B Stock 40 Pound Mix Box Trunk Install Project 11:48

I created this video because so many customers call/email and want to know what comes in the 40 pound mix box of B Stock Damplifier/Damplifier Pro. The product contains trimmed factory error pieces of both Damplifier and Damplifier Pro, we try to keep it more Pro than regular, the pieces are hand trimmed to remove any unusable pieces and it results in a great discounted box for dampers on a budget. The B Stock does contain pieces that may have wrinkles, uneven edges, and/or +/- 25% butyl rubber thickness but are still made from the same high quality 100% American made butyl rubber and 6.5 mil foil as the A Stock Damplifiers. B Stock products are not always in stock as they only are available upon factory errors, but they do come back in stock in burst throughout the year so always check back if they are out of stock when you first check. The 40 pound B Stock box can be found and purchased here at: In this project I used about 15 pounds of the 40 pounds of B Stock. I only did single layer coverage as I do not have a loud bass system or loud exhaust in this vehicle. The 40 pound Box can cover between 60-90 sqft enough to the average sized car floor, doors, and trunk area. Second Skin For The Win!!!!

  • Second Skin Da...
    I created this video because so many customers call/email and ...

Product Reviews

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  1. Best stuff I have ever used 5 Star Review

    Posted by on 1st Nov 2017

    I bought a single box of Damplifier Pro B-Stock for my 2015 Camaro's trunk. From the factory there is zero deadner installed. So after changing exhaust and upgrading the audio, I was hearing rattles and drone. This single pack was about to make a huge difference, but did not give complete coverage. For my car I need two of these to get full coverage(will be buying a secong one to complete). Those out there that are buying the "cheaper stuff", have no idea on what they are missing on. No harsh smell, stiff, durable, stays in place, and does its job very very well. As my build goes on, I will be returning to Second Skin for all my sound and thermal needs.

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