Making Gilsonite Varnish for Paints

A gilsonite varnish simplifies paint production.

Steps

1. Charge solvent or oil into a stirred tank.
2. Heat if using oils (150–200°C) or keep cool for solvents with good ventilation.
3. Add gilsonite slowly.
4. Mix until fully dissolved.
5. Filter.

Typical concentration

30–50% solids in solvent.

Uses

The varnish can be blended with alkyds, oils and pigments to make finished paints.

Choosing concentration

Process control

• Add gilsonite slowly to avoid lumps.
• Keep temperature controlled when using oils.
• Measure viscosity at a fixed temperature.

Filtering

Filter through 50–100 µm bags to remove insoluble ash and grit.

Storage

Store in closed containers; stir before use if any settling occurs.

See paint grade gilsonite and solubility guide.