Hermetic Power Armor (No radiation damage from water)
⚪ Last updated 2017⚠️ Install Order · 2 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview

🔍 Analysis
- 👍 3.3% endorsement rate — high engagement, a strong quality signal
- 🏆 #5 of 50 Power Armour mods in this game by downloads
📋 About This Mod
What does this do?
This mod prevents radiation damage from being in water (or more), as long as you're wearing a full power armor. Wearing only a frame (or only some pieces) won't change a thing. This is the same as having the perk aqua(boy/girl), but without the water-breathing ability.
Make sure that your character is not in a Power Armor in your last save before installing/updating/uninstalling this mod! You will most very certainly get permanent bugs otherwise.
New in v2. 0: - Remade the mod to hopefully work better. 2 editions:
- Standard gives you immunity to radiation damage from being in water and improves the way environmental radiation resistance works to be more on par with the Hazmat Suit. You need to be wearing a full Power Armor for this to work.
- The main advantage of this edition is that it should be compatible with most mods.
- Extended does the same as standard, as well as giving you immunity to fire, poison, stagger and increasing the stability when using scoped weapons. It also increases the wearer's strength by 15 as long as your battery isn't empty and increases carry weight by 250. Immunity to fire and poison require a full Power Armor to work.
- This edition risks being incompatible with most mods affecting the general Power Armor stats, which is in part why I've added effects which have nothing to do with it being hermetic.
I've slightly changed the conditions for these effects to apply, hopefully that should make them work even with other mods.
Other recommended mod:
Vault 81 Molerat Disease Immunity with Power Armor and Hazmat by ParasiteX
_____________________________________________________________________________________________________________________ Notes: - To make Power Armors even better than the Hazmat Suit at protecting against all radiations, you can use the "experimental shielding" material, added by the optional materials available in my mod PAMAP.
- Most sources of fire damage also do energy damage, so for example, you can still take damage from a flamer, but less than without this mod.
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HISTORY:
_____________________________________________________________________________________________________________________All-In-One option in v1. 3:
- Fire, Poison and Water Radiation Immunity: Equipping a full power armor grants y
This mod for Fallout 4 makes power armor fully waterproof, preventing radiation damage from water while wearing a full set. It includes optional extras, though specifics aren't detailed. With over 1,600 endorsements and 48k downloads, it's a popular quality-of-life tweak for power armor users.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Community favorite with 1,608 endorsements and 48,076 downloads.
- Solves a real annoyance for power armor users who hate swimming in rads.
- Simple concept, likely plug-and-play with no complex setup.
⚠️ Cons
- Last updated in 2017 — may not be compatible with the latest Fallout 4 patches or DLC.
- Only affects water radiation — if you wanted broader power armor tweaks, this won't cover them.
For Fallout 4 players who love wearing power armor but hate taking radiation damage every time they cross a river or swim. It's a pure quality-of-life mod, so skip it if you're looking for gameplay overhauls or new armor models.
💡 Beginner Tips
- Make sure you have a full set of power armor equipped — the mod only works when all pieces are worn.
- If you're using a mod manager like Vortex or NMM, install it through there to keep your load order clean.
- Since the mod is old, check the comments section for any reported issues with current game versions.
📊 Mod Details
- Game
- Fallout 4 Mods
- Author
- Mcgan
- Version
- 2.0
- Downloads
- 48,076
- Endorsements
- 1,608
- Category
- Power Armour
- Created
- 12/30/2015
- Updated
- 9/18/2017
🔧 How to Install Fallout 4 Mods
Download from Nexus.
📖 Full step-by-step install guide for Fallout 4 →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for Fallout 4 commands, item IDs, and more.
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