BudsGunShop.com - Sealed Ammo?

Kevin, yes sir, this has a sealed primer. Actually accidentally dropped one of these but in 9mm down the bathroom sink. By time I got around to unscrewing the pipe to get it out was sitting in a puddle of water for 5-6 hours. Dried it off let it sit for a day and fired it without any issue. So they're sealed tight. Hope this helps.

Kevin, yes, each cartridge is also loaded with a high-grade primer that’s sealed into the case to protect against moisture and other elements.
Stay safe & have a great day!

Hi Kevin and welcome to the Buds Community. The Primer is sealed. Details here : americanrifleman.org/content/preview-federal-premium-hydra-shok-deep-380-acp/ - Cheers and stay safe!