Gilsonite, or North American Asphaltum is a natural, resinous hydrocarbon found in the Uintah Basin in northeastern Utah. This natural asphalt is similar to a hard petroleum asphalt and is often called a natural asphalt, asphaltite, uintaite, or asphaltum. Gilsonite is soluble in aromatic and aliphatic solvents, as well as petroleum asphalt. Due to its unique compatibility, gilsonite is frequently used to harden softer petroleum products. Gilsonite in mass is a shiny, black substance similar in appearance to the mineral obsidian. It is brittle and can be easily crushed into a dark brown powder.
That is the definition of gilsonite, it is illegal in half the states, most gypsie sealers mix gasoline, used oil and some vanella extract to hide the gas odor and seal.
Dont tell me that I dont know what gilsonite is.
Now get a life, leave me alone and go seal a driveway for 75.00