Preparations for wound treatment often contain zinc oxide because of its antiseptic effect. It is often used in dentistry and is considered a biomaterial. As an ingredient in Bubbles & Natural Nose and Paw Ointment, zinc oxide serves to dry out the surface of the skin. We use this against chapped dog noses, cracked dog paws and other weeping wounds. For athlete's foot and other dermatomycoses, zinc oxide supports healing and serves as a sunscreen.