Magnesium hexafluorosilicate

Magnesium hexafluorosilicate (CAS 18972-56-0), also known as magnesium fluorosilicate, is an inorganic fluorosilicate salt used industrially as a surface hardening agent and biocidal preservative.

Where is Magnesium hexafluorosilicate used?

• Construction: reacts with calcium hydroxide in cured cement to densify and harden surface layers of floors, pavements and structural elements
• Textile and leather: fixing and preservation agent against microbial attack in fabrics and hides
• Paper: surface modifier improving wet strength and resistance to biological deterioration
• Water treatment: fluoridating and conditioning agent in municipal and industrial programs
• It is applied to porous substrates to improve durability and modify surface chemistry.

Commercial specifications

• Solution concentrations typically 20% to 30%
• Purity levels and packaging formats vary by application; bulk supply available for large-scale procurement