Kjoatmon
Kjoatmon asked Laurence E. Dahners:

Sealing Mars Tunnels? Use graphine wallpaper. As you make a new tunnel, use waldos to coat the inside with wallpaper with adhesive or a Viveka surface printer. Leaks, impacts, cracks due to tidal forces, etc. would be pre-sealed with a stretchable material that would not conflict with any supports that were added. Working through it needs special tools, but graphine is not the top of the harness chain, so all good.

Laurence E. Dahners I think it'd be a lot easier to find and seal any leaking spots with a caulk like material. Graphene isn't stretchy and probably will be difficult to bond together edge to edge even with some overlap.
Laury

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