Case modding to block magnetic waves

[trend]

Hello, I currently have a computer case inside of a 3x2foot metal cabnet. I also have some computer boards I made that will sit outside of the case. One of the board has a lot of magnetic sensitive equipement on it (relays). Is there any material that I can wrap around the computer and my equipment that will block magnetic waves?

thanks-Lee

[Constantinos]

Aluminum foil? The only thing that bloms EMP/EMD is metal.

[k3nshin]

i dont think the aluminum foil will work, too thin

but a big slab of lead will........