Gilsonite in High-Solids and Lower-VOC Coatings

Regulations push coatings toward lower volatile organic compounds (VOC).

Challenges

Gilsonite needs solvent to dissolve, so formulators must balance solids and viscosity.

Approaches

• Use lower softening point grades for lower solution viscosity
• Combine with reactive diluents or oils
• Use gilsonite in emulsions (with emulsifiers)

Emulsions

Gilsonite can be blended into asphalt emulsions for water-based coatings.

Why VOC matters

Volatile organic compounds contribute to smog and are regulated in many regions. Coating manufacturers reduce VOC by increasing solids or switching to water-based systems.

Options with gilsonite

Testing

Measure VOC by the relevant method and confirm drying, sag and film properties at the new solids level.

See paint grade gilsonite.