SioxX®-Mag is designed for microsilica-gel bonded MgO castables. It enhances the rheological properties, reduces the water demand and increases the flow.


  • Tailor-made products for microsilica-gel bonded mixes and castables
  • Reproducible wet-out, flow and set-time
  • Easy to dose
  • Easy to disperse in the dry and wet mix
  • Robustness of mix through compatibility with other raw materials (dead burned MgO, fused MgO, sea water MgO, olivine and other different MgO sources…) 


  • Microsilica-gel bonded MgO castables 


The product is available in 20 kg small bags. Please contact our sales representative for more details. 

Storage conditions

Store in the original packaging (or re-seal opened packages) under dry conditions above 0°C. Shelf-life (best before): 12 months from the date of production, if stored properly.

Technical data
Appearance    Grey powder
Bulk density kg/m3 500 -700
pH-value (10% solution)   5 - 7
SiO2 %w/w 30-50
Al2O3 %w/w  30-50
Proprietary additive %w/w 5-25

Dosage recommendation: 2-3 %w/w (of castable)

Test methods

Test methods are available upon request