Quote:
Q. What is Insta-Fire?
A. Insta-Fire is a patented blend of volcanic rock, wood pellets, and paraffin wax. This patented formula is what makes Insta-Fire water resistant for use in even the most severe weather.

http://www.instafire.com/help-center/#iffaq

I'm sure it's good stuff, but is it much different than putting some paraffin wax on dryer lint, woodchips and sawdust and storing in a mini-ziploc? Go crazy and add some magnesium shavings (smile). If it's inexpensive (I didn't check the price) it would certainly be easier to buy it pre-made though.