100% natural. No additives. Resin-rich fatwood firestarters. Lights wood and charcoal fires. Fast lighting. No additives. Duraflame Fatwood comes from the tree stumps of non-endangered pines that continue to absorb quick-burning pitch after the trees have been felled. The concentrated, 100% natural resin ignites quickly from one match and generates an intense, sustained flame. No new trees are felled to make Duraflame fatwood and no additives have been applied to the product.