I am genuinely interested, need some advices.

[dkbit98]

What is airgapped here? I have few laptops that I use for work.

Airgapped computers are not directly connected to internet so you can't really use your work computer for that.

How do I use a seperate address?

Any wallet can generate new receiving addresses, in Electrum for example you just click on New Address button or you select one manually from Adresses tab.

What could be a danger proof material?

Sorry but I don't know what your talking about here.

Which hardware wallet is most used to the people on this platform?

I don't know what platform are you talking about but most used hardware wallets are Trezor and Ledger, and I would suggest using open source wallets.

[Pmalek]

What is airgapped here? I have few laptops that I use for work.

Airgapped in the sense that the laptop can't and shouldn't connect to the Internet anymore. You take a laptop, reinstall its OS, and remove the network card or at least you make sure you never go online with it anymore. You would need a second wallet on an online computer that will go connect to the internet to broadcast your transactions, and a medium like a USB stick to transfer an unsigned transaction > sign it > broadcast it, etc. 

What could be a danger proof material?

A piece of stainless steel plate is a material that will protect your seed from fire or water. Perform a search for "cryptosteel" or "crypto cassette". A make-it-yourself solution like this one is also an option.

[miningsetup]

What is airgapped here? I have few laptops that I use for work.

Airgapped in the sense that the laptop can't and shouldn't connect to the Internet anymore. You take a laptop, reinstall its OS, and remove the network card or at least you make sure you never go online with it anymore. You would need a second wallet on an online computer that will go connect to the internet to broadcast your transactions, and a medium like a USB stick to transfer an unsigned transaction > sign it > broadcast it, etc. 

What could be a danger proof material?

A piece of stainless steel plate is a material that will protect your seed from fire or water. Perform a search for "cryptosteel" or "crypto cassette". A make-it-yourself solution like this one is also an option.

If my wallet is offline then how am I going to sign and broadcast the a transaction? You said my device should not have an internet connection.

Thank you for the idea of danger proof. I am looking for a way of how I go for DIY because I should not trust a machanic to draw the words for me.

[Pmalek]

If my wallet is offline then how am I going to sign and broadcast the a transaction? You said my device should not have an internet connection.

We are now moving off topic from the original topic of discussion. Topics like that are better discussed in the Bitcoin Development & Technical Discussion.

To quickly go over the process:

- Download Electrum on your online device and put it on a USB drive. Place that in your offline PC and install Electrum.
- From your offline PC, you need to copy the master public key, paste it on your USB, and import it into Electrum on your online PC.
- On your online device, initiate the transaction creation process as you normally would. Once it's created, you can't broadcast it (because you don't have the private keys), but instead you should save it on your USB again. Alternatively you can create a QR code as well.
- Bring the saved transaction file back to your offline PC where you need to sign it.
- When it's signed, you need to save the new file on USB again.
- Plug it in on your online device and broadcast the transaction.

Note:
You can get your master public key by clicking on Wallet > Information in you Electrum client.
The exporting and importing of the transaction files is done through Tools > Load Transaction > From File.
 
Let's not continue with technical discussions in Meta please.

[miningsetup]

Thank you very much. It's been a pleasure knowing the little details. I was able to create a airgapped wallet and it wouldn't be possible with the information you provided.

Response to Pmalek