We now have some video of R-Max burning. Turns out that it burns reluctantly, although the smoke is likely pretty damn toxic. Here's the video.

www.youtube.com/view_play_list

As a result, we've updated the safety policy here: www.appropedia.org/Hexayurt...formation

While I can't *recommend* anybody build a hexayurt out of this material, or anything which is not properly safety rated for this kind of application, I can say that the flammability is much less bad that I'd feared.

I think that anybody who is thinking of using this material for Burning Man or other uses should watch the video, maybe do their own testing on a single sheet, and decide for themselves. I can't make your safety decisions for you, but I can pass along the data.

Have a great burn,

Vinay