Sealed for sure but a glass jar is the last storage container that I would use. I read a story about a guy at the Winchester plant that dropped a glass jar with 10,000 primers in it...and he died. Just a note of caution there.
"Always place your clothes and weapons where you can find them in the dark"
"Understand that the enemy is not the enemy in his own eyes ;this may offer you an opportunity to make him your friend. If not, you can kill him without hate, and quickly."