Exteiror Mgo Board2020-09-03T11:59:30+08:00

Magnesium Cement Board

ROCKMAX magnesium cement backer board is made from magnesium oxysulfate cement, grade E mesh fiber and waterproof polymers, integrated light weight,fireproof, waterproof , flexible. ROCKMAX magnesium cement backer board is economic and durable, durability tested to EN 12467(fiber cement board standard). Highly recommend for decorative veneer substrate, ETICS substrate, aluminum composite board substrate, curtain wall substrate and stucco substrate etc.

A1 Fireproof Will not release toxic gas when it is burning
High Strength Bending strength 12mm < 16 Mpa
Durable Tested to BS EN 12467 category A for exterior sheathing
Dimension stable Dimension changes <0.3% in exterior wall
Low water absorption Water absorption is lower than fiber cement board
Cut easily Score and snap cut by utility knife
Material Safety meet EN REACH requirement, exclude 191 kind of harmful substance

Fire Resistance

Mold Resistance


Easy cut and work with

Impact Resistance

Heat Resistance


Building Safe

Moisture Resistance

Insect Resistance


Health Safe

Magnesium Cement Board Technical Data Sheet

Parameter Result Test Standard
Density <1050kg/m3 BS EN 12467 -2012
Bending strength 12mm< 16 Mpa BS EN 12467 -2012
Water absorbing by weight/24 hours < 15% BS EN 12467 -2012
Water impermeability  after 24h, water gauge 5 cm Lack of leakage BS EN 12467 -2012
Shrinkage and expansion rate(outdoor) <0.3% ASTM C 1186-08
Thermal conductivity <0.22W/(m·K) ASTM C 518-10
Asbestos or formaldehyde None EN REACH
Fire Resistant A1 EN ISO1182 &1176
Chloride content <0.03% ASTM C 871
Wet – dry          50 cycles
Heat rain          50 cycles
Freeze-Thaw      100 cycles
Strength remain>75% EN 12467
Category A  Class 3
Surface burning and smoke Class A  Flame Spread<25
Smoke Develop<25
ASTM E 84-12

Magnesium Cement Board Applications:

Application EIF & Stucco board ETICS backer board
Exterior backer board for brick veneer Exterior backer board for curtain wall
Exterior backer board for aluminum composite panel Exterior backer board for tile
Exterior fire resistant envelop system
Accessory(exterior wall) Steel frame or wood frame Self drilling screw
Self adhesive mesh tape Flexible jointing compound(Sika,Knauf grey)
Drained cavity batten,wall warp Insulation, mortar, mesh net, waterproof primer
Limitation Can not use as exterior cladding Thickness no less than 9mm
Can not serve extreme high temperature >70’c

Magnesium Cement Board Loading Capacity



Quantity 1 x Pallet

Loading capacity in 20ft CNT

Bulk Load In 20ft CNT

12mm x 1220 x 2440


67 pieces

540 pieces

 650 pieces

12mm x 1220 x 2750


67 pieces

540 pieces

 600 pieces

12mm x 1220 x 3050


65 pieces

520 pieces

 600 pieces

● Other thickness and dimension can be customized