Product information

Mulcoa is a registered trade name for alumina silica calcines made from the highest quality deposits in the USA. 

Our customers use Mulcoa to manufacture high-quality fired and monolithic refractory products.

Mulcoa standard grades

  • 5-8mm (-8+5mm)
  • 3-5mm (-5+3mm)
  • 1-3mm (-3+1mm)
  • 0-1mm (-1mm)
  • 0-250μm (-60#)
  • 0-150μm (-100#)
  • 0-15μm (-200#)

Other grades are available on request; please contact your representative for further information.


Our materials are available in 25kg paper sacks, 1000kg bulk bags, or as bulk as standard.

Mineral information

Chemical properties of different Mulcoa grades.

Mulcoa 45Mulcoa 60Mulcoa 70
AL2O3 [%]46.858.668.9
SiO2 [%]50.037.826.7
Fe2O3 [%]0.951.131.22
TiO2 [%]1.892.212.82


Our alumina-silica calcine is produced in Georgia, USA.


The alumina-silica calcine, Mulcoa, is a non-toxic, non-hazardous stable mineral. You can download the Material Safety Data Sheets for the different grades from the data centre.

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