Fallout 76: How To Get Pure Cobalt Flux

Here’s how to farm the ingredients needed to make Pure Cobalt in Fallout 76.

Fallout 76: How To Get Pure Cobalt Flux

Items are abundant in Fallout 76's large open world, and while some are rather common, others are scarce. Occasionally, you will need to collect a rare item for a crafting recipe; however, many crafting items in Fallout 76 are hard to obtain.

Pure Cobalt Flux is an item you may need for crafting in Fallout 76, and it's a very challenging item to acquire due to the multiple items you need to collect before the option to craft it becomes available. Below you can find out everything you need to know about Pure Cobalt Flux and how to get it in Fallout 76.

Updated April 25, 2024, by Andrew Scariati: If you're looking for Pure Cobalt Flux, Fallout 76 certainly doesn't make it easy until you reach the story's final missions. We've added some ideas for how to spend your hard-earned Pure Cobalt Flux in Fallout 76. Whether you're here fresh from the Fallout TV show, or returning to Appalachia, Pure Cobalt Flux is an exceptionally useful resource.

Do not use a Scrap Kit when you have Flux in your junk; this will break it down into components before you can purify it.

What Is Pure Cobalt Flux?

Fallout 76: How To Get Pure Cobalt Flux

Pure Cobalt Flux, also called Stable Cobalt Flux, is an item you can usually obtain through crafting with items you find in a blast zone after launching a nuke into the area.

Pure Cobalt Flux will be listed as "Stable Cobalt Flux" in your menu, and when you receive it from events, so be aware that the terms refer to the same thing.

You need Pure Cobalt Flux or Stable Flux to craft various powerful items, including Decontamination Showers and Power Armor Jet Packs.

See more items you can craft in the final section below.

How To Get Pure Cobalt Flux In Fallout 76

Fallout 76: How To Get Pure Cobalt Flux

There are two major ways to get Stable Cobalt Flux:

  1. Craft it at a Chemistry Station
  2. Earn it from Events

You can craft Stable Flux, which acts as Pure Cobalt Flux, from the raw flux you can find from plants inside Blast Zones, the areas a nuke has recently hit.

First, you can collect flux from plants in a Blast Zone regardless of who launched the nuke, so waiting for somebody else to launch a nuke to collect flux can be easier than launching one yourself.

If you want to launch a nuke yourself, then you'll need to complete the following steps first:

1. Join and reach General rank in the Enclave.

2. Gather eight Nuke Codes.

3. Obtain a Nuclear Launch Keycard by defeating a Cargobot.

4. Enter a Missile Silo , which is the location where you can launch a nuclear weapon.

There are multiple types of flux, including:

  • Raw Cobalt Flux
  • Raw Fluorescent Flux
  • Raw Yellowcake Flux
  • Raw Violet Flux
  • Raw Crimson Flux.

You can use each of these items to craft Pure Cobalt Flux; however, you need ten Raw Flux to craft one Pure Cobalt Flux.

This raw form must be purified into Pure/Stable Flux at a Chemistry Station, or it will deteriorate into Inert Flux.

You can't mix and match the types of Flux , so you must have ten Raw Violet Flux (for example) if you want to craft a single Pure version.

The plants that can grant you these types of flux include the following.

Blast Zone Plants That Contains Raw Flux



Silt Bean

Glowing Fungus

Wild Mutfruit

Mothman Eggs

Starlight Creeper

Mutated Fern

Wild Melon Blossom

Giant Pitcher Plant

Strangler Pod

Wild Gourd Blossom


Wild Razorgrain

Brain Fungus

Wild Tarberry

Bleach Dogwood


Wild Corn




Glowing Resin

Wild Tarberry

Wild Tato Blossom

Soot Flower

Bleach Dogwood




Firecracker Berry

Ash Rose

Once you have ten of one of the flux types, you must travel to a Chemistry Station and find the "Nuked Flora" tab.

Fallout 76: How To Get Pure Cobalt Flux

You need the following items to craft Stable Flux, which you can use as Pure Cobalt Flux in crafting recipes:

  • Ten raw Flux of one type
  • Hardened Mass
  • Glowing Mass
  • High-Radiation Fluids

You can acquire the other three items by defeating enemies in a blast zone, as they will drop these items at random.

Fallout 76: How To Get Pure Cobalt Flux

If you'd rather skip the hunting, gathering, and crafting portion , you can head over to Events like Scorched Earth or A Colossal Problem, and you'll receive Stable Cobalt Flux as a reward once you defeat the Scorchbeast Queen or Earle.

What To Use Pure Cobalt Flux For

Once you've managed to collect enough Pure (Stable) Cobalt Flux from events, or crafted it from the nuked fauna, you can create several superb items, like the Jet Pack, using Pure Cobalt Flux:

Item Name

Item Type

Jet Pack

Power Armor

Kinetic Dynamo

Power Armor Mod

Optimized Servos

Power Armor Mod

Adrenal Reaction Serum


Empath Serum


Healing Factor Serum


Herd Mentality Serum


Ultracite Railway Spike


Ultracite Plasma Cartridge


Shielded Lining

Armor Mod

The Jet pack mod lets you launch yourself into the air but costs Action Points and accelerates the rate at which your Fusion Cores drain, similar to sprinting.

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