The National Pine is treated in an autoclave with a wood preservative product - Tanalith E NB. This treatment makes the wood resistant properties for its application to the outside, protecting it from dry rot, fungi and other wood decay.

After treatment, the wood may receive paint without any problem;

• Supports any type of finish;
• Can be handled without any danger;
• No need for extra care to renew resistance to fungi and insects.
• The treated wood pose no harm or risk to the environment, people or animals.