MagSheathing™ delivers superior Magnesium Oxide (MGO) panels — fire-rated, moisture-resistant, mold-proof, and 100% eco-friendly. Built for Canada's climate, available across North America.
Compatible with wood frame, metal frame, and SIP assemblies — interior and exterior.
Accepts virtually any finish — paint, plaster, stucco, tile, wallpaper, and more.
No fly ash, formaldehyde, or crystalline silica. Safe for allergy and asthma sufferers.
All MagSheathing™ panels are available in 4 ft × 8 ft sheets in multiple thicknesses to suit every application.
| # | Size | Thickness | Approx. Weight | Typical Use | Availability |
|---|---|---|---|---|---|
| 1 | 4 ft × 8 ft | 1/8" (3mm) | 30 lbs | Walls & Ceilings | In Stock |
| 2 | 4 ft × 8 ft | 1/4" (6mm) | 45 lbs | Walls & Ceilings | In Stock |
| 3 | 4 ft × 8 ft | 11/32" (9mm) | 67 lbs | Walls & Ceilings | In Stock |
| 4 | 4 ft × 8 ft | 13/32" (10mm) | 72 lbs | Walls & Ceilings | In Stock |
| 5 | 4 ft × 8 ft | 1/2" (12mm) | 77 lbs | Walls & Ceilings | In Stock |
| 6 | 4 ft × 8 ft | 5/8" (16mm) | 100 lbs | Walls, Ceilings & Subfloor | In Stock |
| 7 | 4 ft × 8 ft | 11/16" (18mm) | 120 lbs | Walls & Ceilings | Order Required |
| 8 | 4 ft × 8 ft | 3/4" (20mm) | 130 lbs | Sub-flooring | Order Required |
MGO is the smart choice for builders and architects who demand performance, safety, and sustainability.
ASTM-tested and A1 Fire Rated. MagSheathing™ is a sustainable, fire-resistant building material for commercial and residential construction.
Maintains structural stability when exposed to moisture. Will not warp, swell, or delaminate under normal exposure conditions.
Made from natural magnesium sulfate via a low-energy manufacturing process. 100% recyclable and contains no toxins.
Antimicrobial characteristics make it resistant to mold, mildew, fungus, and rot — ideal for high-humidity environments.
Safe for those with allergies, asthma, or chemical sensitivities. No fly ash, formaldehyde, crystalline silica, or toxins.
Completely inorganic — not a food source for termites, carpenter ants, or wood-boring insects.
Stronger, lighter, and more durable than alternatives. Scores and cuts easily with standard tools, with excellent screw and nail hold.
Freeze/thaw tested for 36+ months. Perfect for Canada's harsh winters and for year-round construction in any environment.
See why architects and builders are switching to MGO over traditional sheathing materials.
| Feature | MagSheathing™ MGO | OSB | Exterior Gypsum | Drywall | Cement Siding |
|---|---|---|---|---|---|
| Fire Resistant Walls | ✓ | ✗ | ✗ | ✓ | ✗ |
| Moisture Resistant | ✓ | ✗ | ✗ | ✗ | ✓ |
| Mold Resistant | ✓ | ✗ | ✗ | ✗ | ✓ |
| Subflooring | ✓ | ✓ | ✗ | ✗ | ✗ |
| Structural Sheathing | ✓ | ✓ | ✗ | ✗ | ✗ |
| Termite Proof | ✓ | ✗ | ✓ | ✓ | ✓ |
| Eco-Friendly / Non-Toxic | ✓ | ✗ | ✗ | ✗ | ✗ |
| Freeze/Thaw Resistant | ✓ | ✗ | ✗ | ✗ | ✓ |
MagSheathing™ is today's superior building material that does it all — for residential, commercial, and industrial projects.
Fire-resistant base for exterior and interior walls, siding, soffits, and fascias. Ideal for wood and metal frame construction.
A solid, sustainable foundation for flooring installation. Stronger and more moisture-resistant than OSB.
Provides strength and support for interior and exterior coverings. Compatible with virtually any finish material.
Excellent for use in Structural Insulated Panels (SIPs) — providing superior performance in insulated building envelopes.
Perfect for commercial and industrial spaces requiring fire resistance, durability, and clean-room compliance.
Bathrooms, kitchens, basements, and any high-humidity space benefit from MGO's moisture and mold resistance.
Hear from the professionals who use MagSheathing™ on their projects across Canada and the USA.
"MagSheathing replaced our standard OSB on a large commercial project in Vancouver. The fire rating alone was worth the switch — our inspector was impressed."
"We used it for a basement subfloor in a high-moisture area. Two years later — zero mold, zero warping. I won't use anything else for wet applications."
"The team at MagSheathing was knowledgeable and helped us spec the right thickness for each application. Pricing was competitive and shipping was fast."