Product information

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

Mulcoa is a high mullite chamotte produced by calcining low alkali clays for consistent quality and chemistry. Applications include the manufacture of 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.

Mulcoa Packaging

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

Mineral information

You can find information on the chemical properties, origin and toxicology of Mulcoa here.

Chemical properties of different Mulcoa grades.

The table below shows the percentage of Aluminium Oxide (AL2O3), Silica Dioxide (SiO2), Iron (III) Oxide (Fe2O3), and Titanium Dioxide in Mulcoa 45, 60 and 70 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


Mulcoa is the registered trade name for alumina silica calcines made 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.

To find out any further information, please fill in the contact form in the bottom right and a representative will be in contact.