- Non-dyed (clear) kerosene
- Klean-heat kerosene substitute
- Standard clear lamp oil
- Citronella oil (outdoor use only)
Determine what size box you're going to need. Gather up everything you want to shield and see how much space they require. Likely items include shortwave radios, walkie-talkies, crucial medical equipment (i.e. a glucose meter), and spare electronic parts for your generator and car. Note that batteries are not affected by EMP, so they don't need to be included in your stash.
Choose a box or container that closes as securely as possible. Any gaps will render the grounding ineffective.
Wrap your box securely in aluminum foil. Be sure the body of the box and its lid are totally encased.
Tape every seam down firmly. You can use regular tape for this, although aluminum or copper tape will provide better security.
Line the inside of the box with cardboard to ensure that your electronics do not contact any of the foil or metal tape.
Place your items inside and seal the lid firmly.