Arborvitae essential oil is concentrated in tropolones, such as hinokitiol, which are a group of chemical compounds that protect against environmental and seasonal threats and have powerful purifying properties. These compounds also contribute to Arborvitae’s natural insect repellent properties. Thujic acid, another tropolone found in Arborvitae, has been studied for its ability to protect against common threats in the environment. Native to Canada, all parts of the Arborvitae tree were used extensively by Native Americans for health benefits and for building vessels, totem poles, baskets, and clothing. Because of its natural preserving properties, Arborvitae prevents wood from rotting, which makes it popular in woodcraft and for preserving natural wood surfaces.