Gilsonite
HS code 271490
Gilsonite is a natural asphaltite that seals micro-fractures, reduces fluid loss and stabilises shale in drilling fluids. It also modifies asphalt and serves inks, paints and waterproofing. We trade it by ash content, from 5 % to 25 %.
- Drilling and cementing additive
- Asphalt and bitumen modifier
- Paint and ink ingredient
- Waterproofing binder

Specification
| Property | 5 % | 10 % | 15 % | 20 % | 25 % |
|---|---|---|---|---|---|
| Ash, % | ≤ 5 | ≤ 10 | ≤ 15 | ≤ 20 | ≤ 25 |
| Moisture, % | ≤ 1 | ≤ 1 | ≤ 1 | ≤ 1 | ≤ 1 |
| Softening point, °C | 160-220 | 160-220 | 220-260 | 220-260 | 220-260 |
| Flash point, °C | 290-310 | 290-310 | 290-310 | 290-310 | 290-310 |
| Solubility in CS₂, wt % | 85-90 | 80-85 | 70-75 | 65-70 | 60-70 |
| Colour | Black | Black | Black | Black | Black |
Typical values from current supply. The binding values are those on the contract and the Certificate of Analysis for each lot.
Available forms
- Micronised powder
Grades
- Gilsonite 10 %
- Gilsonite 15 % (drilling)
- Gilsonite 25 %
- Other ash grades on request
Packaging
- 1,000 kg jumbo bags
- 25 kg woven PP bags with liner, palletised
- 25 kg woven PP bags with liner in jumbo bags
Main applications
- Oilfield drilling additive
- Cementing additive
- Road asphalt performance
Trade terms
- Supply in 20' and 40' containers, or in bulk where noted
- Every bag labelled with batch number and net weight
- Certificate of Analysis (COA) with each shipment
- Technical data sheet (TDS) and MSDS on request
- Free samples for qualification
- FOB or CFR offers, lot sizes to suit your programme
Values that set the price
- Ash content grade
- Solubility in CS₂
- Bag type and palletising
- Lot size and destination port
Ask for a price on Gilsonite
Send grade, quantity, packaging and destination port. We reply with an offer and the matching data sheet.