Is a jeep Rubicon air tight?

No, a Jeep Rubicon is not airtight. While it's a relatively well-sealed vehicle compared to many others, it's not designed to be airtight. There are numerous gaps and seals around doors, windows, and other openings that allow air to pass through. Airtightness is generally a feature of specialized vehicles like submarines or cleanrooms, not off-road SUVs.