Urethane
by Jeff
(Tx.)
A friend found that hardened urethane coating burns violently. This was lit accidentally while burning leaves on the ground. He demonstrated this with a chunk that was about an inch cubed to get some wet logs lit.
I snagged a couple to keep in the truck which I only plan on using in an emergency. It's waterproof and keeps forever.
I have heard that pine knot works very well for a natural solution.
Start to prepare your trip before you head for the trails!