Copper naphthenate wood preservative is primarily used to protect wood from decay, rot, and insect damage. Its key purposes include:

1. Fungal Resistance: It helps prevent the growth of fungi that cause wood decay.

2. Insect Protection: Effective against wood-boring insects, such as termites and carpenter ants.

3. Water Repellent: Provides some degree of water resistance, helping to prolong the life of the wood.

4. Deep Penetration: Its oil-based formulation allows it to penetrate deeply into the wood fibers for long-lasting protection.

5. Non-Toxic Options: Compared to some other wood preservatives, copper naphthenate is considered less toxic, making it suitable for certain applications where safety is a concern.

6. Versatile Applications: Ideal for outdoor projects, such as fences, decks, and utility poles, as well as indoor applications where wood protection is needed.