Black Diamond Asphalt
Driveway & Paving Company in Vacaville, CA

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About Us
read moreWe are the sole global supplier of the naturally occurring hydrocarbon resin mined only in Northeastern Utah. Gilsonite uintaite is used extensively as a high-performance additive in oil and gas drilling and other industrial applications. Gilsonite uintaite's superior performance has been proven by decades of use in each of our end markets. In the oilfield, Gilsonite plays a critical part in meeting increasingly complex drilling challenges around the world. In the industrial market, Gilsonite plays a vital role in improving the quality and performance of inks, paints, asphalt paving and emulsions, construction and foundry casting.