Can magnesium oxychloride floors be used in wet areas like bathrooms?

No, they deteriorate rapidly under continuous dampness and are restricted to dry, indoor areas.

What materials make up the binder?

The binder is formed by the exothermic reaction of calcined magnesite (magnesium oxide) and a gauging solution of magnesium chloride.

Is there a corrosion risk to embedded steel?

Yes, due to the high chloride content, direct contact with structural steel or embedded conduits must be avoided or properly insulated to prevent corrosion.

IS 658

: 1982

Code of Practice for Magnesium Oxychloride Composition Floors

CurrentRareCode of PracticeArchitectural · Flooring, Wall Finishing and Roofing

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This code covers the preparation, laying, finishing, and maintenance of magnesium oxychloride (magnesite) composition floors. It is used by engineers and contractors when installing heavy-duty, seamless, non-sparking indoor flooring in industrial or specialized commercial buildings.

Code of Practice for Magnesium Oxychloride Composition Floors

Quick Reference Values

Typical thickness for single coat12 mm to 15 mm

Specific gravity of gauging solution1.18 to 1.20

Minimum curing time before light traffic48 hours

Practical Notes

Magnesium oxychloride flooring must never be used in continuously damp areas or exposed to direct rain, as water breaks down the binder.

The gauging liquid's specific gravity must be carefully controlled using a hydrometer to ensure the proper chemical reaction.

Protect underlying structural steel, pipes, or reinforcement, as chloride ions from the flooring can cause severe corrosion if moisture penetrates.