Natural Gilsonite® uintaite is non-hazardous and non toxic.C It is a very pure resinous rock, formed of a complex combination of different kinds of hydrocarbons. This unique natural combination, rich in nitrogen and beta-carotenes and low in sulfur, is what makes Gilsonite so special. Its unique chemical and physical properties make Gilsonite a high-performance, multipurpose additive that is also a cost-effective solution.