What additives are used in WPC to improve insect resistance for outdoor use?

Wood Plastic Composite (WPC) is a popular material for outdoor applications due to its durability and low maintenance. However, to enhance its resistance against insects, specific additives are incorporated during manufacturing. Common additives include:

1. Borate Compounds – Effective against termites and other wood-boring insects, borates disrupt their digestive systems.

2. Insecticidal Additives – Chemicals like permethrin or bifenthrin are often added to repel or kill pests.

3. Zinc Borate – A long-lasting additive that prevents fungal decay and insect infestation.

4. Natural Oils – Some WPC formulations include neem or cedar oil for eco-friendly pest deterrence.

5. Metal-Based Additives – Copper or zinc nanoparticles can provide additional protection against insects and microbes.

These additives ensure WPC remains resistant to insect damage, making it ideal for outdoor decks, fences, and furniture. Proper formulation balances effectiveness with environmental safety, extending the lifespan of WPC products.