Alien Epoxy (Fallout 3)

Alien epoxy is an item which is added to Fallout 3 in the Mothership Zeta add-on.

Uses
It can be used to increase the condition of your currently equipped weapon, up to a maximum of 100%. Since you cannot usually find normal "Earth-made" weapons aboard the ship to salvage for repairs, it's important to use epoxy to repair your normal weapons, should you choose not to use alien weapons. The percentage repaired depends on the player's repair skill:

Alien epoxy comes in tubes and over 100 tubes can be found in Mothership Zeta. Since they have no weight, all tubes found can be carried without being over-encumbered. While the effect of one tube may not conform to the table above, you can always increase a weapon's condition to 100% by applying multiple tubes consecutively, regardless of your repair skill.

Alien epoxy cannot repair armor or clothing. However, it does increase your DR (damage resistance) by 10 points for 1–12 in-game hours.

Behind the scenes

 * An "epoxy" is a step-growth thermoset polymer that solidifies around the applied area.