Dark industrial pads are the Rubber clue
Find Rubber on dark rubberized pads and panels that can be cut from industrial structures. The lower Depot gives you more of these surfaces to harvest once you recognize their appearance.
Save Rubber for the Gas Tank recipe
The Gas Tank recipe unlocks when you first collect Refined Metal. It requires 2 Rubber, 4 Wires, 2 Refined Metal and 4 Aluminum, so keep a Rubber reserve while gathering the rest of that craft.
Recognizing Rubber instead of loose ore
- Should I search for a loose black ore chunk to get Rubber?
- Look at industrial pads and panels instead. The useful Rubber surfaces are dark and rubberized, and you cut them from the structures.
- How much Rubber does the Gas Tank use?
- Set aside 2 Rubber for the Gas Tank, together with 4 Wires, 2 Refined Metal and 4 Aluminum.