Featuring a 1/2" layer of Magnesium Oxide (MgO) sheathing on the exterior side, DuPont™ ArmorWall™ Plus Fire-Rated (FR) Structural Insulated Sheathing (SIS) arrives at the job site complete with a high-quality air and water-resistive barrier on the exterior.
ArmorWall™ Plus FR SIS
DuPont™ ArmorWall™ Plus Fire-Rated (FR) Structural Insulated Sheathing (SIS) is an ICC listed, high strength, fire-resistant exterior wall sheathing product. ArmorWall™ Plus FR SIS offers a factory-applied, high quality air and water-resistive barrier.. Once seams and fasteners have been sealed the enclosure may be considered “dried-in”, allowing interior construction to commence regardless of final exterior finish status. ArmorWall™ Plus FR SIS incorporates five traditional building enclosure elements into a single panel product: structural sheathing, fire-resistance, air barrier, water-resistive barrier, and a high-performance continuous insulation layer. The five-in-one system of ArmorWall™ Plus FR SIS can replace several traditional individual components that, on their own, add cost, labor and complexity to a project.
Air and Water-Resistive Barrier |
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Cladding Attachment Support |
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Fusion Technology |
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Install in Harsh Weather |
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  | Method | Unit | Value |
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Air Leakage Resistance<sup></sup> | ASTM E2357 | - | pass |
Air Infiltration at 75 Pa<sup></sup> | ASTM E283 | cfm/ft2 | 0.01 cfm/ft2 (0.1 L/s/m2) |
Air Infiltration at 300 Pa<sup></sup> | ASTM E283 | cfm/ft2 | 0.04 cfm/ft2 (0.2L/s/m2) |
Water Penetration at 6.27 psf (300 Pa)<sup>1</sup> | ASTM 3311 | - | Pass |
Mold and Mildew<sup></sup> | ASTM C1338 | - | Pass |
Fastener Sealability<sup>2</sup> | ASTM D1970 | - | Pass |
Fire Resistance<sup>3</sup> | NFPA 2853 | - | Pass |
Vapor Permeance (of 2" panel)<sup></sup> | ASTM E96 (Procedure A) | - | 0.5 Perms (grains/hr in Hg ft2) |
Flame Spread/Smoke Developed Index (facer)<sup></sup> | ASTM E84 | - | 0 / 0 |
Flame Spread/Smoke Developed Index (insulation)<sup></sup> | ASTM E84 | - | 10 / 250 |
Thermal Resistance<sup></sup> | ASTM C518 (ASTM-54) | - | 6.5 per inch |
Foam Compression Range<sup></sup> | ASTM D1621 (ASTM-65) | - | 30 psi |
Fastener Withdrawal Capacity<sup>4,5</sup> | ASTM D1761 | - | 284 lbs |
Fastener Pull Through<sup>4,5</sup> | ASTM D1761 | - | 505.2 lbs |
Fastener Shear in Sheathing Only<sup>4,5</sup> | ASTM D1761 | - | 519 lbs |
R-Value | Thickness | Width | Length |
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21 | 3.75 | 48 | 96 |
10 | 2 | 48 | 96 |
15 | 2.75 | 48 | 96 |