This solid fuel tablet will ignite with a spark. After using this product, I will no longer buy the other cubes that require a flame to ignite. I compared this product to the Esbit cubes in a windy environment that would not allow a sustained flame from a lighter or match. I was able to light the Fastfire cubes multiple times with only a spark.
Works in the rain, cold, and even with wind. These little firestarters are the best of the market and work exceptionally well. I through a few in my packs and recommend these to my friends