One related item that I've recently considered (more in lieu of the traditional blue tarp than as a versatile solar still, etc.) is DuPont Tyvek housewrap.

For its thickness (and therefore weight) it seems about as puncture/tear resistant as anything I've seen, weighing merely 2.7 oz/yd^2. DuPont's website also lists a commercial version, which apparently is somewhat thicker and even more durable than the residential version. Both are available in 10 foot widths.

Obviously both versions are highly effective against air and water penetration, so it seems like a good choice as an emergency rain/wind shelter or a ground cover, other than it seems to generate a lot of noise when it flaps around in the wind. Off hand, I can't think of why it couldn't be used as a solar still, or as a rain water catch, but so again could the heavy weight garbage can liners everyone seems to have packed away.

I would expect that it would be relatively easy to procure the end of a roll from a friendly contractor and give it a try.

Additional specifications

Jim