Technical Data Sheet for the
LIBERTYMAG
MGO SULFATE BOARD
Key Points
Certified by the International Code Council (ICC)
Meets the ASTM E136 noncombustible grade standard
Suitable for use in all types of noncombustible construction
Eco-friendly, chloride free, non-corrosive on metal & steel structures
Can be used for fire-rated wall, ceiling and subflooring assemblies
Description
Our MgO sulfate boards are intended for use in any construction as exterior structural sheathing (1/2-inch-thick boards only), floor underlayment, and interior surfaces, as defined in IBC Section 2502. They can be used as substrate sheets suitable for decoration with paint, wallpaper, ceramic tile, natural stone, or dimension stone on walls in interior dry areas. They may also be used as interior and exterior facers for sandwich panels.
Sizes
thickness x width x length1/4in. x 4ft. x 8ft.
6.4mm x 1220mm x 2440mm
1/4in. x 4ft. x 10ft.
6.4mm x 1220mm x 3048mm
1/2in. x 4ft. x 8ft.
12.7mm x 1220mm x 2440mm
1/2in. x 4ft. x 10ft.
12.7mm x 1220mm x 3048mm
3/4in. x 4ft. x 8ft.
18mm x 1220mm x 2440mm
3/4 in. x 4ft. x 10ft.
18mm x 1220mm x 3048mm
Standards
LibertyMag MgO Sulfate Board exceeds ANSI standards for cementitious backer units (CBU). See ANSI A118.9 for test methods and specifications for ANSI A108.11 for interior installation. Exceeds industry standards as an exterior substrate for exterior finishes. Our board exceeds ASTM C1325 standards for non-asbestos fiber-mat reinforced cementitious backer units.
Materials
LibertyMag MgO Sulfate Boards are formed in a continuous process of aggregated phosphate-based magnesium oxide with polymer-coated, glass-fiber mesh completely encompassing edges and back and front surfaces. The edges are formed smooth with a patented poly-propylene fabric-wrapped edge. The ends are square cut.
Sulfate base – ESR 4642
All construction types exterior structural sheathing – ESR 4642 2.0 (1/2 in. 12mm Boards Only)
Accepts- Paint, Tile, Wall Paper, Natural Stone – ESR 4642 2.0
Used as facers for Structural Insulated Panels (SIP) – ESR 4642 2.0
Fire-resistant rated construction – ESR 4642 2.0
Reinforced with fiberglass mesh both faces – ESR 4642 3.0
Available in 1⁄4 6mm, 1⁄2 12mm, 3⁄4 18mm – ESR 4642 3.0
Available in 4x8 and 4x10 panels – ESR 4642 3.0
Flexural strength 580 psi (ASTM C1185) – ESR 4642 3.0
Humidified Max deflection 0.11 machine direction – ESR 4642 3.0
Humidified Max deflection 0.23 cross-machine – ESR 4642 3.0
Nail Head Pull Through 96 lbf (ASTM D1037) – ESR 4642 3.0
Noncombustible (ASTM E136) – ESR 4642 3.0
Class A Flame Spread (ASTM E84 FS-0/SDI-5) – Test CA&A1012522-70 7-11-22
Seismic A, B, C 1:1 Aspect Ratio – ESR 4642 4.1.1 (Fasteners 8” edges and field)
Flooring underlayment – ESR 4642 4.1.2
Shear wall installation – ESR 4642 4.2.2 (Allowable Shear 126 plf Table 2)
Transverse Load 53+ and 22- – ESR 4642 (Table 1)
Exterior Use when painted or covered – ESR 4642 5.8
Complies with ICC Acceptance Criteria AC386 – ESR 4642 6.1 (Fiber Reinforced Panels)
Complies with ICC Acceptance Criteria AC376 – ESR 4642 6.2 (Reinforced Cementitious Floor)
Complies with ICC Acceptance Criteria AC378 – ESR 4642 6.3 (Reinforced Cementitious Interior Wall)
Manufactured under ICC Quality Control – ESR 4642 7.1 (Labeled and ICC Listed ESR 4642)
Complies with California State Wide Planning – ESR 4642 CBC and CRC Supplement Report
California Office of Statewide Health Planning and Development – (ASHPD)
California Health care Access Information – (HCA)
California Division of State Architects – (DSA)
Complies with Florida Building Code 2023 8th Edition – ESR 4642 FBC Supplement