
Sealer and Filler FAQ
How long does gilsonite sealer last? Typically 2–4 years. Can I seal new asphalt? Wait until it has…



Gilsonite for pavement sealers, crack fillers, joint sealants and bituminous mastics.
Sealer and filler grade gilsonite dissolves readily in solvents and hot bitumen. It gives pavement sealers their deep black colour and durability and adds hardness and tack-free surfaces to crack fillers, joint sealants and mastics.
| 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.

How long does gilsonite sealer last? Typically 2–4 years. Can I seal new asphalt? Wait until it has…

Slurry seals and micro-surfacing combine emulsion, fine aggregate and filler. Can be incorporated into the asphalt before emulsification…

Cracks are widest in cool weather, which makes spring and autumn ideal for crack sealing. Sealant placed in…

Many regions restrict VOC content and ban certain sealer types. Check local rules before selecting a product. Store…

Coverage depends on surface texture and age. Always follow the product data sheet. A 1,000 m² car park…

Dark fillers and putties for wood, metal and masonry can use gilsonite as a binder. Gilsonite gives a…
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