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fireproof magnesium oxide board for fire door boardfireproof magnesium oxide board for fire door board

fireproof magnesium oxide board for fire door board

  • Density:1.0-1.2kg/m3
  • Fireproof:grade A
  • flexual strength:≥8MPa
  • anti-impact;≥2kJ/m2
  • halogenation resistance:no water and no moisture created
  • water content:less than 8%
  • dry shrinkage rate:rate ≤0.3%
  • expansion in water rate:≤ 0.6%
  • content of chloride:≤ 10%
  • Certificate:ASTM,SGS,ISO9001,2000Qc systems

fireproof magnesium oxide board for fire door board

For Mgo board, there are two different formula, one is Chloride mgo board(Mgcl2), another one is the sulfate mgo board(Mgso4).


For Mgo board, pls kindly allow me to give you a detailed introduction.

For Mgo board, there are two different formula, one is Chloride mgo board(Mgcl2), another one is the sulfate mgo board(Mgso4).

Mgso4 & Mgcl2 means use different formulation to produce the board. But the board has different quality standard, so it means

Mgcl2 board have two kinds, common(standard) mgo board & Premium quality sanding mgo board.

For Chloride mgo board, this kind of formula has been developed for more than 30 years, the technology is mature. if used in internal walls; partitions, all these applications will be definitely no problem. 

But it cannot be used in the exterior walls. the character of chloride ion in the board will absorb water, so if use chloride mgo board in wet areas, in outside(the weather and temperature changes frequently outside) after 2-3 years, there will be some problem like sweating; moisture problem.


Compared to Chloride mgo board, the biggest advantage of sulfate mgo board is it solved the problem of Chloride ion. So if clients lived in some wet climate countries and usually have lots rain or want to use the exterior areas, sulfate mgo board is a good choice. 

Actually the cost of the sulfate mgo board is higher than the chloride mgo board, because the production technology is much more complicated.

Onekin Green Building Materials Co., Ltd.


Contact Person:Arya

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