Gilsonite is widely recognized for its exceptional role in metal casting. Used as an additive in green sand and no-bake mold systems, Gilsonite improves surface finish, reduces defects, and enhances collapsibility. For foundry professionals seeking consistency and efficiency, Gilsonite is an indispensable material.
In foundry sand mixtures, Gilsonite provides controlled volatility, high lustrous carbon output, and superior binding. It acts as a carbon additive, resin enhancer, and sand binder, delivering smoother surfaces and cleaner castings with fewer gas defects.
Fixed Carbon: 75–85%
Volatile Matter: 10–20%
Ash Content: <5%
Moisture: <1%
Melting Point: 160°C – 220°C
Color: Dark black with high sheen
These characteristics make Gilsonite ideal for steel, iron, and non-ferrous metal casting.
200 Mesh Powder: For precision casting with high surface finish demands
100 Mesh Powder: For general gray iron and ductile iron casting
High Carbon Low Ash Grade: For core-making and low-defect environments
Custom sizes are available based on furnace type and sand system.
25 kg paper bags (PE-lined)
500 kg jumbo bags
1 MT big bags with liner
Custom bulk packaging for factory-scale operations
All packaging is dust-free, moisture-resistant, and export-compliant.
Gilsonite is commonly used in:
Green Sand Molding – Improves collapsibility, reduces casting defects
No-Bake Molding Systems – Enhances sand-to-metal contact
Core Production – Increases carbon residue in core gases
Iron and Steel Casting – Reduces veining and surface blowholes
Precision Metal Casting – Ensures smoother, blacker finishes
Blend with base sand and binder (at 2–5% addition rate)
Mix uniformly to ensure consistent carbon content
Adjust moisture content for green strength
Recycle used sand with careful loss-on-ignition tracking
Gilsonite can be added directly to the mixer or pre-blended with seacoal or bentonite.
High Lustrous Carbon Yield – Produces smoother casting surfaces
Reduces Defects – Eliminates gas holes, veining, scabbing
Improves Mold Collapsibility – Eases shakeout and reduces cleaning time
Better Flowability – Enhances compaction and molding
Stable Burnout Profile – Reduces odor and smoke vs. synthetic additives
| Feature | Gilsonite | Seacoal | Pitch Resin | Graphite |
|---|---|---|---|---|
| Natural Material | Yes | Yes | No | Yes |
| Burnout Cleanliness | High | Medium | Low | Medium |
| Carbon Residue | High | Medium | High | High |
| Odor & Smoke | Low | High | Very High | Low |
| Surface Finish | Excellent | Good | Average | Good |
Gilsonite gives a better combination of casting quality, workability, and environmental compliance.
Gilsonite works well with:
Bentonite Clay
Furan and Phenolic Resins
Seacoal and Bituminous Additives
Synthetic Polymers and Coatings
Its thermal behavior complements various molding systems, both traditional and modern.
Non-hazardous and non-toxic
Use dust collection during mixing to minimize airborne particles
Gloves and masks recommended for high-volume handling
Environmentally preferable to petroleum pitch and synthetic resins
Gilsonite is a safer, cleaner additive with better workplace outcomes.
Shelf Life: 2–3 years if stored properly
Store in dry, cool environments
Avoid moisture and direct exposure to sunlight
Reseal opened bags tightly to prevent clumping
Automotive and Trucking Parts
Agricultural Machinery Casting
Railroad Components
Valve, Pump, and Pipe Casting
Steel and Non-Ferrous Foundries
Whether you produce brake drums or engine blocks, Gilsonite can help you do it better.
From our export points in Turkey (Mersin), UAE (Jebel Ali), and Iran (Bandar Abbas), we supply:
Bulk shipments for steel and iron foundries
Tailored grades for cast iron producers
Fast delivery across Europe, Asia, MENA, and Americas
With every shipment, you get consistency, documentation, and technical support.
Foundry-specific grades designed by engineers
Large volumes available year-round
Custom packaging and documentation
Support for green and no-bake sand systems
Trusted by major casting facilities worldwide
We help foundries pour cleaner, stronger, and smoother castings.
Gilsonite is transforming the foundry world by offering a natural, high-performance carbon additive. From improved casting finishes to safer working environments, its benefits are proven. Let us be your trusted Gilsonite supplier for industrial success in every mold.
1. How much Gilsonite should I add to green sand?
Generally, 2% to 5% of the total sand mix, depending on desired casting finish.
2. Can Gilsonite replace all seacoal?
In many cases, yes. It can be used as a full or partial replacement.
3. Is Gilsonite safe for workers?
Yes. It is natural and emits significantly less smoke than other carbon additives.
4. What types of metal casting is Gilsonite best for?
Iron, steel, and some non-ferrous metal castings like brass or aluminum.
5. Do you offer technical support for usage?
Absolutely. Our team can help you integrate Gilsonite into your process efficiently.