"Explosives" Where?

Where are there explosives in this game? You need flares and explosives to make an explosive charge, but i cannot seem to find explosives anywhere, so I can use my research kit on it.

It’s only randomly available in one of the crate types that falls in the airdrop.

Or in any number of houses that would require you to already have it to get into. :slight_smile:

Thanks a lot man.