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EXACOR™ Wall Sheathing

EXACOR wall sheathing panels are fire-resistant[1], high-density, structural magnesium oxide cement panels. When used as an exterior wall sheathing, EXACOR™ panels can replace other sheathing materials in certain assemblies, potentially reducing the number of layers required.

Limitations and restrictions apply to EXACOR™ sheathing used in exterior walls of Type III Construction that are greater than 40ft in height above grade plane. Please refer to ESL-1290 for more information on the use of EXACOR sheathing in NFPA 285 assemblies. EXACOR sheathing is not approved for use on Type I or II buildings except as noted in ESR 4635.

  • Sheathing Panel, 5/8" × 4' × 8'

  • Sheathing Panel, 5/8" × 4' × 9'

  • Sheathing Panel, 5/8" × 4' × 10'

  • Sheathing Panel, 1/2" × 4' × 8'

  • Sheathing Panel, 1/2" × 4' × 9'

  • Sheathing Panel, 1/2" × 4' × 10'

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01 Products

Sheathing Panel, 5/8" × 4' × 8'

Panel Count 28
Fire Resistance ASTM E119, ANSI/UL 263
Structural ESR-4635

Sheathing Panel, 5/8" × 4' × 9'

Panel Count 25
Fire Resistance ASTM E119, ANSI/UL 263
Structural ESR-4635

Sheathing Panel, 5/8" × 4' × 10'

Panel Count 24
Fire Resistance ASTM E119, ANSI/UL 263
Structural ESR-4635

Sheathing Panel, 1/2" × 4' × 8'

Panel Count 38
Fire Resistance ASTM E119, ANSI/UL 263
Structural ESR-4635

Sheathing Panel, 1/2" × 4' × 9'

Panel Count 33
Fire Resistance ASTM E119, ANSI/UL 263
Structural ESR-4635

Sheathing Panel, 1/2" × 4' × 10'

Panel Count 32
Fire Resistance ASTM E119, ANSI/UL 263
Structural ESR-4635
Nominal Product Thickness Nominal Panel Size Panel Count Weight (lbs./sq. ft.) Max Support Spacing Edge/Field Spacing[4] Maximum Allowable Shear Values (plf)[5] [6] [7] [8] [9] [10] Transverse Wind Loads (psf)[7] [8] [11] Fire-Resistance-Rated Assemblies[12] Code Evaluation Report
1/2"
(12 mm)

4' × 8'
(1220 mm x 2440 mm)
4' × 9'
(1220 mm x 2750 mm)

4' × 10'
(1220 mm x 3050 mm)

38

33

32

2.7 24" 4/6" 230 +/-38

1-Hour Exterior Load-Bearing Wall
MOS-1290-04

ESL 1290

ESR 4635
5/8"
(16 mm)

4' × 8'
(1220 mm x 2440 mm)

4' × 9'
(1220 mm x 2750 mm)

4' × 10'
(1220 mm x 3050 mm)

28

25

24

3.3 24" 4/6" 220 +/-68

2-Hour Exterior Load-Bearing Wall
MOS-1290-03

ESL 1290

ESR 4635

02 What Is MgO

Magnesium oxide (MgO) offers simple strength and streamlined installation for a building panel with exceptional workability.

MgO panels are cementitious panels that are primarily made of inorganic materials reinforced with layers of glass fiber mesh. EXACOR™ MgO panels are manufactured to provide a streamlined solution for strength, fire resistance and sound performance.

Learn More About MgO

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  • Fire Resistance[1]

    Provides fire resistance as part of fire-resistance-rated floor/ceiling assemblies.

  • Dimensional Stability

    Withstands exposure to moisture and does not warp, expand, cup or delaminate like other (wood) panels do.

  • Inherent Strength

    Contains a proprietary layered mesh reinforcement for added structural value.

  • Quality Assurance

    Manufactured under a quality control program with inspections by ICC-ES and Underwriters Laboratories (UL) to ensure consistent product performance.

  • Optimize Material & Labor Costs

    High-performing material that may save time and help reduce materials and trades needed to install.

04 Warranty

Warranty Information

See our 10-Year Limited Warranty.

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