Earcons Magnesium Oxide board is a new generation of high performance, environmentally friendly, Earcons Magnesium Oxide based building Board (MgO board) is a factory-made, non-insulating sheathing board product. It can be used for a number of applications including wall and ceiling linings, fascias, soffits, tile backing, underlayment and Wall Paneling Construction. It is made of magnesium oxide, a type of mineral cement, and is commonly called simply "Earcons Magnesia due to its chemical composition of magnesium (chemical symbol Mg) and oxygen (chemical symbol 0). Think of Earcons Magnesia as a type of sheathing board (sort of like Acoustical Wall Paneling) but with much-improved characteristic such as fire resistance, weather ability, strength, resistance to mold, mildew, and so on. The main ingredients of this product are non-toxic, eco-friendly such as: Magnesium carbonate - magnesium oxide (MgO), magnesium chloride (MgCl), perlite(SiO2), fiber glass scrim, cellulose, proprietary additives, etc.Water ResistantEarcons Magnesia board is water resistant and virtually impervious to water (not more than 0, 34weight %) Earcons Magnesia cement used for the production is insoluble in water and prevents delamination of the board as well as swelling after a long-term exposure to water.Mould and insect resistantNo doubt you are aware of the current level of concern about mould and mildew and the very real risks to health. Earcons Magnesia board does not support the growth of mould or mildew at all, as there is nothing in Earcons Magnesia board that is attractive to mould and mildew. Similarly, insects have no interest in it, as it is inedible.