Welding Tool

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Welding Tool
Welding Tool.png
Inventory icon.

Welding Tool sprite.png

One of the most crucial tools on board the submarine. Also works underwater.

Type Tool
Item Cost 75 Marks
Fuel Welding Fuel Tank.pngWelding Fuel Tank

Incendium Fuel Tank.pngIncendium Fuel Tank

Fuel Capacity 1 fuel tank
Skill Requirements
Mechanical Engineering 20
Handicap Fuel used up 3x as fast
Fabricator Skill Mechanical Engineering 30
Crafting Time 20
Fabricator Materials Steel Bar.pngSteel Bar


Deconstructing Time 10
Deconstructor Materials Steel Bar.pngSteel Bar


The Welding Tool is a tool that can be operated in Barotrauma. It is one of the most essential tools, as it allows crew members to repair the submarine.


Welding Tools are used to repair structures such as walls and windows. They can also be used to seal doors and hatches. The only way to un-seal a door is by using a Plasma Cutter.

Structures being affected by the welding tool are highlighted by a rectangle. The color of said rectangle determines the condition of the structure: a greener color indicating that the structure is in a stable condition and a redder color to reflect a poor condition. When the structure is about to break the rectangle will begin dissipating. Sealing a door will have a grey progress bar.


The Welding Tool requires both hands to equip. Holding down the right-click (mouse2) button will aim it in whichever direction your cursor is positioned. Holding down the left-click (mouse1) button will activate the tool, affecting any structures within its range.

If a player attempts to use a welding tool without the appropriate skill level, the Welding Fuel Tank will be used up 3 times faster.

Damage Values

Attack Damage
Structure Damage
Stun Duration
Kinematic Force
Explosion Radius (m)
Damage Type
Welding Tool