Osmose Naturewood preserved wood is the name given to timber that has been preserved with an Osmose Naturewood preservative system which is based on copper and an organic co-biocide (Alkaline Copper Quaternary).

Alkaline Copper Quaternary systems have provided proven performance for well over a decade in locations throughout Europe, North America, Australia and Japan. Osmose Naturewood preserved wood is pressure treated to use classes UC1, UC2, UC3 and UC4 (see table), and can be used for fencing, timber decking, landscaping timbers and construction timbers.

Protim Clearchoice is an organic based preservation system for wood, pressure treated for use in construction projects that require protection to Use Class UC1, UC2, UC3 (see table) such as roof timbers, timber framing, internal and external joinery and other internal and external timber projects that are above dpc/ground level. When using Protim Clearchoice in external applications it will need to be coated with a suitable external coating which will be maintained in service.