Chicago Flameproof (866) 884-7591

Wisconsin Flameproof (866) 884-7593

North Texas Flameproof (866) 884-7594

MagTech™ Fire Retardant Treated OSB

MagTech™ OSB (oriented strand board) is the obvious choice for contractors wanting to meet strict building requirements with ease. The fire retardant treated OSB provides protection against fire damage through the use of a magnesium oxide layer that significantly decreases flame and smoke spread. Ideal for load bearing building applications, MagTech™ OSB can be used in the same way that traditional OSB is used but provides serious protection against fire damage and is a more environmentally friendly solution.

How is Fire Retardant Treated OSB created?

MagTech™ is created by applying a thin layer of a magnesium oxide coating to the OSB through a high-pressure lamination process. This chemical compound produces superior fire retardant properties, and the lamination process provides a better solution to creating fire retardant OSB compared to chemical sprays. In fact, MagTech™ OSB has an ASTME-84 Class A status with a flame spread of 0 and smoke development of 5. Flameproof Companies’ fire treated OSB can be laminated with magnesium oxide on one or both sides of the sheathing. Let us know your application’s needs, and we’ll customize your order.

Why Choose MagTech™ OSB?

MagTech™ OSB’s enhanced performance helps you meet strict building codes with ease. Its superior performance protects against fire and smoke damage better and more effectively than traditional OSB, and it’s non-toxic and environmentally friendly. It even protects against mold and moisture. MagTech™ OSB can also be used as exterior sheathing in certain applications requiring a 2-hour rating according to ASTM E-119, which is an area that many fire retardant alternatives fall short. Choosing MagTech™ OSB provides superior support and quality to your building, protecting it for years to come.

Call for a Quote (866) 884-7595

View the Safety Data Sheet.
View the MagTech™ Submittal Package.
View the MagTech™ Product Data.
View the MagTech™ Warranty.
View the MagTech™ Intertek Product Listing.
View the 120-01 2 Hour Load Bearing Wall Listing / 3D Drawing.
View the 120-2 1 Hour/2 Hour Load Bearing Wall Listing / 3D Drawing.
View the 120-03 3 Hour Load Bearing Wall Listing / 3D Drawing.
View the 60-1 1 Hour Load Bearing Combo Wall Listing / 3D Drawing.

Request a Quote

Fire Treated

Wood graphicWe stock a complete line of lumber and plywood. We provide quick turn around on special order treated items.

Green Products

  FSC® Certified lumber and Plywood in Treated and untreated for all of your LEED projects.

Building Products


We specialize in non-combustible material and hard-to-find commercial industry items.

Chicago Flameproof

1200 South Lake Street
Montgomery, IL 60538
phone 866-884-7591
fax 630-896-4773

North Texas Flameproof & Wood Specialties Corp

4215 Chickasaw St.
Fort Worth, TX 76119
phone 866-884-7594
fax 817-534-9807

Wisconsin Flameproof

8530 West Calumet Rd
Milwaukee, WI 53213
phone 866-884-7593
fax 414-365-3674