Osmose FirePRO Treated Wood User Guide
Osmose FirePRO* fire retardant treated wood (FRTW) products are pressure impregnated with an Osmose FirePRO, an interior high temperature fire retardant chemical formulation based on proprietary Osmose technology.

Historically, fire retardants have depended upon phosphorus based compounds to achieve fire performance properties. While the unique Osmose FirePRO chemistry contains no phosphates, independent testing performed in accordance with industry standards has shown Osmose FirePRO FRTW products exhibit fire performance properties without compromising other critical engineering properties such as strength, durability, corrosivity, and hygroscopicity. Osmose FirePRO FRTW products exhibited strength durability, low hygroscopicity, and resistance to fastener corrosion.

Application
Osmose FirePRO FRTW products are permitted for use in interior, above ground applications where the adopted building regulations permit the use of wood products or fire retardant wood products such as: roof systems, cladding, sheathing, joists etc. It can also be used in certain exterior applications when protected with a suitable and maintained coating system. Osmose FirePRO is a humidity resistant (WPA Type HR) treatment. The specifier and/or end user is responsible for reviewing the test data on Osmose FirePRO FRTW products to determine if they are acceptable for the intended end use.

Working Properties
After treatment, exposure to rain, snow, or mud must be avoided. Osmose FirePRO FRTW products must be stored indoors or under sheets that offer protection from the elements. Osmose FirePRO FRTW can be cross cut and drilled, but not planed or rip sawn. There are no limitations on the milling or cutting of Osmose FirePRO treated plywood.

Under normal temperature and humidity conditions, most latex and oil-based paints and stains can be used with Osmose FirePRO FRTW products. It should be noted that the use of some paints may affect the fire properties of the end product and care must be taken to select an appropriate paint. Always follow the coating manufacturer's instructions.
Use fixings and other hardware which are in compliance with building regulations for the intended use. Use fixings, hardware or any metal products as recommended by their manufacturer.

Osmose FirePRO Treatment Process
Osmose FirePRO treating solution is applied to timber products under rigidly controlled conditions using a vacuum pressure impregnation plant. Osmose FirePRO FRTW products must be Air or Kiln dried after treatment to ensure that the required properties of Osmose FirePRO are obtained.