Acetylated wood is a type of wood that has undergone a chemical process called acetylation. This process involves treating the wood with acetic anhydride, which modifies the wood's cellular structure. The result is a material that is more resistant to moisture, decay, and insect damage, making it suitable for outdoor use and various construction applications. This treatment enhances the wood's durability without the use of toxic chemicals, making it an environmentally friendly option. Common types of wood used for acetylation include pine, oak, and maple. Acetylated wood is often used in decking, furniture, and other products where longevity is important.