Five different treatment levels result in different properties, which makes it possible to use modified wood for all kind of applications.

The higher treatment levels are denoted with the letter D (durability), which particularly describe improved durability and the durability class reached according to standard EN 350-1. These treatment levels are recommended for applications requiring good durability typically in exterior use. The milder treatment levels are denoted with letter T (treatment). These modification treatment levels are intended to improve primarily other properties besides the durability. They are suitable specially for interior applications where certain color shade is important and both low water absorption speed and reduced moisture deformation is required.