DuPont™ ArmorWall Plus II Fire-Rated (FR) Structural Insulated Sheathing (SIS)
Cuts Like Wood. Burns Like Concrete.
Featuring a 1/2″ layer of Magnesium Oxide (MgO) sheathing on the exterior and interior sides, DuPont™ ArmorWall Plus II Fire-Rated (FR) Structural Insulated Sheathing (SIS) is a two-hour fire-resistant exterior insulated wall sheathing product, complete with a proprietary air and water-resistive barrier on the exterior.
ArmorWall Plus II FR SIS
DuPont™ ArmorWall Plus II Fire-Rated (FR) Structural Insulated Sheathing (SIS) is unique due to its additional layer of sheathing, made of Magnesium Oxide (MgO), a natural mineral with fire-resistant properties, on the interior face, encompassing the rigid foam insulation.
This addition makes ArmorWall Plus II FR SIS two (2) hour assembly rated, twice that of our standard ArmorWall FR SIS™ panels.
ArmorWall Plus II FR SIS arrives at the job site complete with a proprietary air and water-resistive barrier on the exterior, the first coating made exclusively for Magnesium Oxide (MgO).
Due to the high strength and rigidness of the structural sheathing, ArmorWall Plus II FR SIS has the ability to move the stud face to the exterior face of the sheathing and has been tested to support loads equivalent to most building cladding finishes, with minimal creep while under load.
In addition, the unique coating on ArmorWall Plus II FR SIS offers industry-leading exterior adhesion performance and compatibility with tapes, sealants, and other materials, including the ArmorSeal line of products.
The ArmorSeal line of products can be installed and cured in harsh weather conditions, with overall proven functionality of the panel in all outdoor environments
Once seam and fasteners have been sealed the enclosure may be considered “dried-in”, allowing interior construction to commence regardless of final exterior finish status.
Having undergone rigorous testing, ArmorWall Plus II FR SIS allows projects to meet continuous insulation (ci), building codes, and construction schedules faster and cost effectively.
Features and Benefits
Air and Water-Resistive Barrier
Cladding Attachment Support
Ease of Installation
Install in Harsh Weather
Panel Thickness (in.)
Board Size (ft.)
4′ x 8′
4′ x 8′
4′ x 8′