Science

Advantages & Disadvantages of Magnesium Oxide
Ratings and testing:
Fire-resistant (UL 055 and ASTM-tested and A-rated)
Water-resistant (freeze/thaw-tested for 36 months)
Mold/fungus/bug free (non-nutritious to mold, fungus, insects ASTM G-21)
Impact-resistant (ASTM D-5628)
NYC approved (MEA # 359-02-M)
Silica/asbestos free
STC-rated 53-54
No special tools required
Can be used in the place of traditional drywall or cement boards
Hard non-absorbent surface
Using fibreglass backing – with no paper
Сement-based siding subject
Can be used in applications like cement-based siding subject to using water-proof coating systems
Available in colors
Various colors available
Energy efficient
Magnesite calcines at approx 780 Celsius, compared to over 1,400 Celsius required to form traditional Portland cement or calcium oxide, the starting material for the preparation of slaked lime or portlandite used in common mortar and plaster
Biologically friendly construction
Magnesia boards have been mentioned in articles about biologically friendly construction and risks of mold infection
Cost
Comparable in cost to cement board made from Portland cement, with numerous advantages over that material for wet applications
Disadvantages
MgO is very difficult to produce with the necessary physical properties on a consistent basis as it requires precise temperature and humidity levels and strict adherence to the formulation to produce a strong, consistent product. Most Chinese based board production is 80% (or less) pure while our product is 93%.