Magnesium Oxide Board

Magnesium Oxide Board Applications:

  •     Interior Wall and Ceiling Board
  •     Exterior Shealthing
  •     Trim Materials
  •     Fascias
  •     Soffits
  •     Shaft-liner & area separation wall board
  •     Tile backing(backer board)and underlayment
  •     Substrates for coatings and insulated systems such as:Direct Applied Finish SystemsS,EIFS,SIPS,Portland type Stucco and Synthetic Stuccos


What is Magnesium Oxide Board

Magnesium oxide(MgO)has been used dating back thousands of has been founf that magnesium oxidew was used in the Great Wall of China as a cement form.China has the world's largest deposits of magnesium oxide,which is sufficient to resupply the world with cement fibre,gypsum and wood partationing and ceilings every year for the next 800 years.Magnesium oxide board(MgO board)is a factory-made,insulating sheathing board is made primarily of magnesium oxide,and is commonly called simply(MgO)due to its chemical composition of magnesium and oxygen.MgO Board is similar to gypsum board or cement fibre board-however with several improved characteristics such as fire resistance,weather ability,strength,resistance to mould and mildew,flexibility,aderence advantages and so on.


it can be used indoors and out doors and in damp locations as showers or wet areas.Like cement based sidings,if Mg0 is used out doors in an exposed location,it needs sealing in much the same way as cement.Mgo is used structurally,as in bracing for walls,and also semi-structurally,such as an underlayment for flooring.Magnesium oxide board was developed many years ago as a cheap alternative to cement fibre turned out as a coincidence to be a product with many other advantageous characteristics.Mgo Board was extensively used in construction during the 2008 world olympics buildings in beijing...and was used in the world famous Taipei 101 building which up untill recently was the world's tallest building.


It can be used indoors and outdoors and in damp locations,such as showers or wet areas

Magnesium Oxide Board Structure


  •     Interior Wall and Ceiling Board
  •     Facial surface layer
  •     Fibreglass net reinforcing layer,which makes the board durable and stable
  •     Filler layer(includes magnesium cementing agent,perlite and wood chips
  •     Second fibreglass net reinforcing layer
  •     Filler layer of the inner side


Magnesium Oxide Board resists


  •     Salt(sodium chloride)brines and salt water
  •     Chlorine bleach(sodium hypochlorite)and related pool chemicals
  •     Ammonia(ammonium hrdroxide)and related chemicals
  •     Water(freeze/thaw-tested for 36 months),changes in temperature up to 800 degree celcius
  •     Repeated wetting and drying or freezing and thawing
  •     Swelling,losing strength or deterioration
  •     Moulds.mildew,bacteria,fungus,termites,rodents and other organisms
  •     Fire(UL 055 and ASTM-tested and A-rated)
  •     Impact damage

Magnesium Oxide Board is


  •     Non-combustible Class A building materials-20MPa
  •     Breathable and porous for strong coating and adhesive bond
  •     For ALL residential,commercial,institutional construction
  •     Perfect for adding fireproofing to wood frame construction and elsewhere
  •     Excellent acoustic dampening material with higher density and elasticity
  •     Refractory material for infrared(heat)assisting to reduce loss of energy when heating or cooling by reducing conductivity
  •     Non-hazardous,natural,non-toxic and disposable as crushable clean fill
  •     Environmentally friendly and produced without wasting large amounts of fossil fuel or releasing significant CO2 into the atmosphere in production
  •     Available in Chalk White and pre-cut sizes on request
  •     Easier to work with using all types oh hand tools and wood working equipment but also can be cut with a quick score and snaps faster then drywall


Sample Descriptions


A 650mm x 650mm panel without any joint was submitted in order to evaluate its small-scale fire resistance properties in terms of insulation only. The 110 mm thick panels were representative of a system intended for use in the building industry and consisted of a 100mm thick mineral wool core with a 12mm thick Supertec Board outer cladding and a 9mm thick Supertec Board inner cladding.

Test Method

The panel was tested in a small gas-fire furnace in order to assess the its fire resistance. The temperature in the furnace was controlled to follow the ISO standard time-temperature curve. This small-scale test should be seen as a screening test prior to performing a large scale fire resistance test and no Fire Resistance Rating (FRR) can therefore be awarded to a sample based on the small-scale test results.


The temperatures recorded during the tests are depicted graphically below. No comment could be made in terms of integrity or stability based on these small-scale test results. The furnace was operated with the tolerable limits applicable to the ISO Time-Temperature Curve during the test. The test was performed on the 2009-03-25. The insulation criteria were upheld for a period of 60 minutes, at which point the test was terminated. No burn-through was noted during this test. No cracking of the inner board was noted either subsequent to removal of the panel from the furnace.


The small-scale test results indicate that the building system could potentially achieve a Fire Resistance Rating (FRR) of 60 minutes. The small-scale test does, however, show that fundamentally the fire resistance of the core of the system is such that it warrants further consideration.

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