Rubber in Fallout 76 is another common crafting material that is definitely used in the process of creating various different armor, armor mods, weapons, and weapon mods. This is another material that you will end up collecting a LOT of due to it just being in so many common items around the map, but definitely is essential when you get into the modifications part of the game.
Rubber is found in a number of obvious items around Fallout 76, those items include: