• What You Need
• The Process
• Why This Beats Everything Else
• The One Thing People Get Wrong
• The Real Deal

451°F. That’s the temperature at which paper ignites.

House fires burn at 1,100°F.

Your seed phrase is in a drawer, written on the card that came with your hardware wallet.

You do the math.

Most bitcoiners never think about this until something goes wrong. Water damage. Fire. Decades of fading ink. Someone throwing it away. Then they realize they’ve been one disaster away from losing everything they’ve stacked.

For $30 and two hours, you fix this permanently.

Stamp your seed into stainless steel. 304 grade. Same material that survives saltwater corrosion, industrial heat, decades in storage. Paper burns. Steel doesn’t. Steel doesn’t fade. Steel doesn’t rot.

This is what actual self-custody looks like.

§What You Need

Blockmit Washer Jig ($4.99). Two jigs, which means one mistake doesn’t end the project. 1/8“ letter punch kit ($20). M8 stainless washers ($5-10). Steel block or anvil. That’s the entire list.

Total: under $35.

§The Process

Load a washer into the jig. It holds perfectly flat and aligned. Load a letter punch. Strike once, hard. Not a tap. One solid strike. Move to the next letter. Repeat 120 times (24 words, average 5 letters each).

That’s it. Your seed phrase is now etched into metal that will outlast everything you own.

Pro move: only stamp the first 4 letters of each BIP39 word. Every word on the list is uniquely identifiable by its first 4 characters. Cuts the work in half. Standard practice in the community.

§Why This Beats Everything Else

Jameson Lopp tested metal backup solutions independently. 304 stainless is A-grade across heat, corrosion, crush resistance.

Backup solutions that cost $79, $130, $350?

Same material. Same protection.

The difference is you’re doing the work instead of paying someone else to.

§The One Thing People Get Wrong

They keep both backups in the same location.

If they’re both in your safe, you don’t have a backup. You have two originals in the same risk zone. One fire. Both gone.

Split storage. One at home. One elsewhere. That’s the whole point.

§The Real Deal

Your bitcoin is only as safe as your seed backup. Paper is a liability. It’s fragile, it’s temporary, it tells you deep down that you’re betting nothing goes wrong.

Stainless doesn’t bet. Stainless knows.

Full step-by-step guide with photos: https://cryptocloaks.com/how-to-stamp-bitcoin-seed-phrase-metal-blockmit-jig/

Not your keys, not your coins. Your keys deserve metal.

CryptoCloaks builds Bitcoin hardware tools. More at https://www.cryptocloaks.com/blog/