In Foundry and Refractories, for molding high value metals there is more attention to factors such as finishing. Gilsonite can be a superior carbon additive replacing the traditional Sea Coal which has low Carbonic value compared to Gilsonite Foundry Grade Specifications.
Gilsonite contains a high content of volatile matter along with the right amount lustrous carbon content resulting in high quality molding. Also applying foundry grade Gilsonite improves the impartation of casting material from the mold.
Foundry sands are compacted to mold shape and they generally contain clay, silica and one carbonaceous material such as Graphite, Sea Coal or Gilsonite. When the casting material is heated in high temperatures for melting, certain gases are released which could be hazardous environmentally and applying Gilsonite tends to decrease this unwanted hazard.