DIY Faraday Cage

From $9.80$119.00

Over the years we have received a lot of requests for a DIY Faraday Cage Kit. In the past we have recommended using our EMP cloth but in most cases this was cost prohibitive and the cloth does not work well when using with a cardboard or wooden box. After some trial and error we have identified some really nice conductive barrier and tape that applies easily to any style box. The conductive barrier is really nice to work with and forms really tight seals against any edge. The conductive tape helps to secure the seals and provide an extra layer of protection at wear points. The cage that we built was 24″x24″x24″ and offered 67dB of shielding at 100mHz. This means that this cage reduced the electric field by 99.9% which provides more than enough protection in the case of an EMP. We are offering this exact kit below (less the box) OR you can purchase just the material and tape to build your own Faraday Cage kit using your own box of any size.

Description Of Each Option Available:

DIY 24″ Box Kit – You will receive enough pre-cut pieces and tape to cover a 24″ x 24″ x 24″ box or crate.
DIY 36″ Box Kit – You will receive enough pre-cut pieces and tape to cover a 36″ x 36″ x 36″ box or crate.
Conductive Tape – You can purchase individual rolls of conductive tape if needed. Each roll is 2″ wide x 60′ long.
Conductive Material – You can purchase conductive material if you would like to cover your own box or crate. Please see the description below to calculate how much material you would need or contact us and we can assist.

We do not sell wooden crates or boxes as they are widely available online etc. If you would like our recommendation on where to find one please contact us and we can point you in the right direction.


Determining How Much Material You Need If You Are Using Your Own Box

Conductive Barrier is 48” wide and is sold by the linear foot. For example, if you buy 1 foot, you will receive a piece of cloth measuring 1′ x 48″. This should be wide enough for most common size boxes/cages. If your box or cage is going to be larger than 48″ than you will need to have additional strips of material. It is important that you figure in 3″ of overlap if you are using multiple strips to form a proper seal. You would also tape along this seam. Note: Please make sure you calculate an extra 3″ for each side of the box so that you have enough material to properly seal the edge of the box.

Material comes in a width of 48”. Use the table below to determine how many strips of material must be used to cover the box:

Box Width Number of Strips Needed
between 12″ and 48” 1
between 48” and 96″ 2
between 96″ and 144″ 3
between 144″ and 192″ 4
between 192″ and 240” 5

For example:

  • If the box measures 36″ x 36″ x 36″, you would need 1 strip. Next calculate the length by adding the length x height of the box. Since the box is 36″ x 36″ x 36″ high you would need a length of 36″ + 36″ + 36″ + 36″ = 144″ or 12′. Then add the two sides which would be 36″ + 36″ = 72″ or 6′. The total you would need is one strip x 18′


During checkout, specify size of cover, or for assistance with ordering, click CONTACT button at top of page.


EMP Material

EMP shielding material is an excellent way to protect electronics etc. It can also be used to wrap hard-to-cover items, such as red dot sights and lasers. With a PhD in electrical engineering, I was fortunate enough to have the equipment to test more than two dozen brands of shielding material. In the end, I identified one material that meets all these criteria:

  • Good shielding protection
  • Pliable
  • Durable
  • Safe to handle
  • Reasonable cost


Caution-Shock Hazard! Conductive cloth will conduct electricity! Keep away from electrical outlets or other sources of electricity.


If you have questions, please click “Contact” at the top of the page.

Step by Step Video Link

A few questions that I am often asked:

1. What is conductive cloth? Conductive cloth is simply a cotton or polyester cloth in which some of the threads have been replaced with conductive metal threads. In the case of the material that we sell for the DIY Kit, the metal is aluminum. We prefer aluminum based material for these type of projects as it is pliable and offers great blocking capabilities.

2. What can it be used for? Conductive cloth is used to block RF energy, such as that resulting from a high-altitude nuclear EMP. Conductive cloth is especially useful in shielding large or hard-to-shield items, such as automobiles, motorcycles, generators, solar panels, and even gun optics. For small items that can be enclosed, I recommend using EMP Bags.

3. How well does this cloth shield? While the manufacturer makes claims of 30-40 dB, such claims are rarely accurate. What I can say is that in my assessment, this conductive cloth reduces RF fields enough to allow cars, trucks, motorcycles, and isolated generators or solar panels to survive an EMP. However, it is not meant as a direct replacement for a good Faraday cage, which can provide 99.7% (50 dB) or more of field reduction.

4. Do you make the cloth? No. I simply resell the product that I found to be optimal for this application. The price on my website is the same as that on the retailer’s.

5. Can I trust that this is the best cloth out there? I tested more than two dozen conductive cloth materials to find one that I thought was optimal. The cloth that I sell best meets the important metrics of shielding, sewability, durability, safe to handle, not tarnishing or rusting, easily grounded, and having a reasonable cost.

6. How big is the cloth? The cloth is approximately 48″ wide and sold by the linear foot. Example, if you buy three feet, you get a piece of cloth measuring 36″ x 48″. If you buy twenty feet, you get a cloth that measures 240″ x 48″.

7. How much will I need? It depends on what you’re trying to cover. To determine the right amount of material, you will need to make measurements of the length, width, and height of the object. A flexible tape measure is a great way to do this. If you need help sizing the cover, just write me, and I’ll be glad to assist.