Formulating a Gilsonite Pavement Sealer
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Solvent sealer
- Gilsonite: 15–35%
- Aromatic or aliphatic solvent
- Optional additives (anti-settling, UV stabilizers)
Emulsion sealer
- Asphalt emulsion base
- Gilsonite pre-dissolved in asphalt
- Fillers (clay, sand) and polymers
Testing
Drying time, film flexibility, water resistance and colour.
Solvent sealer example
| Component | Typical range |
|---|---|
| Gilsonite | 15–35 % |
| Aromatic or aliphatic solvent | 60–80 % |
| Additives (anti-settling, UV) | 0–5 % |
Emulsion sealer example
| Component | Typical range |
|---|---|
| Asphalt emulsion (with gilsonite in the asphalt) | 40–60 % |
| Clay and mineral fillers | 20–40 % |
| Water | to viscosity |
| Polymer latex | 0–5 % |
| Sand (for traction) | as required |
Key tests
Drying time, film flexibility, adhesion to aged asphalt, water resistance and colour.
Safety
Solvent sealers are flammable. Manufacture and store away from ignition sources with proper ventilation.
Recommended product
Data sheet
Sealer & Filler Grade Gilsonite
| Property | Typical value | Test method |
|---|---|---|
| Appearance | Black powder | Visual |
| Softening point (R&B) | 150 – 180 °C | ASTM D36 |
| Ash content, max | 5 % | ASTM D3174 |
| Moisture, max | 1 % | ASTM D95 |
| Solubility in toluene, min | 98 % | ASTM D2042 |
| Particle size | ≤ 200 mesh | Sieve |
| Typical dosage | Sealer: 15 – 35 % | |
| Packing | 25 kg bags palletized. | |
Typical values. The final specification is confirmed in the COA of each shipment.
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