Structural Mgo Sheathing

ROCKMAX Magply is an extreme high strength structural mgo sheathing. It is made from compressed magnesium oxysulfate cement, high density mesh fiber, waterproof polymers and other reinforcement. Bending strength and screw holding strength close to OSB, it is fireproof, waterpoof and termite resistant, 100% formaldehyde free. It is an innovative board for Interior and exterior sheathing, Mgo Sip, LFS shear wall system and modular wall system.

A1 FireproofNon-flammability meet class A to ASTM E 84.
Moisture resistantWill not mildew and soften in wet condition.
Termite resistantIt is made of natural mineral, definitely reistant to termite.
Superior strengthBending strength 12mm < 25-30 Mpa ,Screw holding< 75N/mm.
Chloride freeNoncorrosive mgo,do not effect metal and screw, do not damp wall.
Durability tested to BS EN 12467. Resist to heat rain, heat and wet, frost thaw, warm water.
Material safety meet EN REACH requirement, exclude 191 kind of harmful substance, formaldehyde and asbestos free.

Fire Resistance

Mold Resistance

Building Safe

Impact Resistance

Heat Resistance

Health Safe

Moisture Resistance

Insect Resistance

ROCKMAX Structural Mgo Sheathing Parameter

ParameterResultTest Standard
Density<1200kg/m3BS EN 12467 -2012
Bending strength12mm< 25-30MpaBS EN 12467 -2012
Water absorbing by weight/24 hours< 20%BS EN 12467 -2012
Water impermeability  after 24h, water gauge 5 cmLack of leakageBS EN 12467 -2012
Dry Shrinkage
Wet expansion
ASTM C 1186-08
Thermal conductivity<0.22W/(m·K)ASTM C 518-10
Chloride content<0.03%ASTM C 871
DurabilityABS EN 12467 -2012
Fire ResistantA1   weight lose<30%EN ISO1182 &1176
Material saftyNone of harmful substanceEN REACH
Surface burning and smokeClass A  Flame Spread<25
Smoke Develop<25
ASTM E 84-12

ROCKMAX Structural Mgo Sheathing Application

ApplicationFire resistant mgo SIPUnload & load bearing CFS wall
Installed wall systemModular construction
AccessorySelf drilling screwSelf adhesive mesh tape
ScraperMortar or adhesive
Flexible jointing compoundWall wrap -DuPont Tyvek
LimitationApplication tempreture < 70’cCan’t not stock outdoor without raincoat

ROCKMAX Structural Mgo Sheathing Loading Capacity



Quantity 1 x Pallet

Loading capacity in 20ft CNT

Bulk Load In 20ft CNT

12mm x 1200 x 2400


68 pieces

540 pieces

650 pieces

15mm x 1200 x 2400


55 pieces

440 pieces

520 pieces

● Other thickness and dimension can be customized