Medium-density fibreboard (MDF) is an engineered wood product made by breaking down hardwood or softwood residuals into wood fibres, often in a defibrator, combining it with wax and a resin binder, and forming panels by applying high temperature and pressure. MDF is generally denser than plywood. It is made up of separated fibres, but can be used as a building material similar in application to plywood. It is stronger and much denser than particle board.
The name derives from the distinction in densities of fibreboard. Large-scale production of MDF began in the 1980s, in both North America and Europe.
MDF Fire Retardant is made with a formaldehyde free (NAF) adhesive system and is designed for critical applications where Class B flame retardant material is required. MDF FIRE has a low flame spread and smoke development as well as extremely low VOC emissions. During the manufacturing process, the flame retardant additive is blended with the fiber throughout the panel. This process delivers superior performance versus topical flame retardant applications. In addition, MDF FR can be machined, cut, sanded, and grooved without compromising the flame retardance. This panel is CARB exempt.