An innovative polymer technology ensures that the fire retardant elements do not leach from the timber. When exposed to fire counteractive elements in the timber react with combustible gases and tar elements that normally range free in untreated timber. These are converted to char, carbon dioxide and water. The layer of char that formed isolates and slows the burning process. For façade applications a Euro class B certificate has been achieved; the best possible fire class rating for timber products. New possibilities of application with timber are created since the FRX treatment is not possible on wood species with a high density.
Since the fire retardant elements are fixed in the timber the treatment is weatherproof. No rain, sun or wind will reduce the fire safety of the timber. Also there is no need for maintenance, because no protective coating is necessary.
The treatment of NobelWood transformed an undurable fast growing pine wood into a timber that has durability class 1. NobelWood with the added FRX treatment has a durability class which will last for over 50 years on the facade.
The FRX treatment will result in a longer lasting natural brown color of NobelWood. While the natural NobelWood will weather to a silver grey in a year, this will take significantly longer for NobelWood FRX.