Gilsonite Powder


HS code 27149030
Physical and Chemical Properties
Appearance Black powder
Specific Gravity 0.95 – 1.14
Ash content 5-20%
Flash Point 600°F (316°C)
Melting Point 400°F (204°C) 400°F (204°C)


Gilsonite is a type of natural asphaltic materials which are widely used as an effective filtration agent additive in oil-based and water-based drilling fluids. Gilsonite may be used in normal or HTHP environments. Other functions of Gilsonite are shale inhibition, preventing seepage loss circulation and differential stuck reduction.

Purchasing Gilsonite From TEAM

TEAM has been actively supplying Iran Gilsonite to numerous industries including drilling fluid service companies, asphalt, paint and has competitive pricing. Our Iran Origin Gilsonite has been supplied to various countries; references are available upon request. We have a standard quality control system in place and can arrange for international inspection with the help of inspection companies such as SGS.

Iran Gilsonite supplier

TEAM is an Iranian Gilsonite Supplier with different percentages of ash for wide variety of applications. Our products are produced with 0-5%, 5-10% and 10-15% ash percentages. Also available in lumps, powder and pellets depending on request.

Granulated Gilsonite with ash between 0-15 percent and diameter of 30 to 40 meshes is also available on request.

Gilsonite powder state with a diameter of 80 to 400 mesh and same ash percentage is also available.

With proper infrastructure and up-to-date machinery, TEAM co. has the possibility of automatic processing, sand separation, crushing, customized packaging and shipping Gilsonite powder to all over the world.


  • Improves emulsion and thermal stability in oil-based drilling fluids.
  • High temperature stability
  • No need for surfactant or etc.
  • Improves filter cake quality
  • Reduce fluid loss in normal or HPHT environments
  • Minimize unwanted torque and drag while drilling


Application of Gilsonite in Drilling industry Gilsonite  is an effective fluid loss controller in oil-based and water-based muds in drilling industry. In problematic shale layers, it can be used as borehole stabilizer. It is often used to plug pore throats of depleted formations to prevent loss circulation problems

Gilsonite Usage In Road Construction and Asphalt Preparation

In road construction and asphalt preparation Gilsonite is used to increase the strength of asphalt against traffic and load, prevent deformation in hot weather, crack at low temperatures and also reduce the effects of moisture in the asphalt mixture. This mineral is a suitable modifier for refinery bitumens due to it's polymeric hydrocarbon material. The resistance of Gilsonite against acid and base and insolubility in water has caused it to be generally used in the preparation of asphalt and waterproofing insulation.

Gilsonite Mines In Iran

Areas with Gilsonite in Iran are mainly located in Kermanshah-Ilam provinces (especially Gilangharb city), Khuzestan and in some other areas such as Yazd have been observed to a limited extent. The existence of these vast areas demonstrates huge reserves of this product and the high capability of supplying Gilsonite in Iran. The geographical strip, where Iran’s Gilsonite supply mines are located, reaches Iraqi Kurdistan and Turkish Kurdistan, crossing the country’s borders.

Types of Iranian Gilsonite

Gilsonite originates from crude oil, which is formed after the gradual evaporation of light materials under the influence of four factors: time, heat, pressure, and special reactions. Main reactions in the production process are oxidation, sulfurization, polymerization and condensation. The product quality of these processes varies according to the type of reactions performed and the duration of the reactions (life of bitumen). So that bitumen is observed with liquid, semi-solid and hard physical states. Most of the Iran Gilsonites are long-lived, but in general they can be divided into two general categories:
  1. Relatively Pure Bitumen: This category is usually found in liquid and semi-solid form with less than 10% minerals. They also have a relatively large amount of volatiles. Examples of this type of Gilsonite (which the exact amount is not available) can be found in Khuzestan province. Their melting point is usually less than 300’F and their degree of penetration (Penetration) varies from 10 in terms of 0.1mm to very soft. Volatiles are less than 7% at 325F for 5 hours and up to 20% at 400F for 5 hours. Their solubility in CS2 is generally more than 90% and their values ​​of C, H, N and S are about 82, 11, 2 and 2% by weight, respectively.
  2. Asphaltic Pyrobitomans: These Gilsonites are mostly with high melting points or non-melting point.

History of Gilsonite

Samuel H. Gilson discovered Gilsonite in the early 1860s. Gilson, who worked in one of Iran’s oil regions, introduced this substance. Although this substance was discovered before him, he did a lot of research to process this product and tried to to use this substance for other applications. He first used this material to insulate wire cables and electrical insulation in general, as well as a coating for wooden pilings. He founded a company specializing in this field. Eventually, his promotional activities in the commercialization of this product led to this naming.  Gilsonite powder supplied bu TEAM chemicals Iran

Safety tips


  • Put on appropriate personal protective equipment
  • Avoid dust information
  • Do not breath dust
  • Use only in a well ventilated area

First Aid Measures

Eye Contact: This substance may cause eye irritation due to the abrasive action of the dust. The degree of the injury will depend on the amount of material that gets into the eye and the speed and thoroughness of the first aid treatment. Skin Contact: This substance is not expected to cause prolonged or significant skin irritation. This hazard evaluation is based on data from similar materials. Ingestion: Drink a couple of glasses water or milk. Do NOT induce vomiting unless directed to do so by a physician. Get medical attention.