Non-metallic materials are substances that do not possess the properties of metals, such as conductivity and malleability. These materials can be organic or inorganic and include items like plastics, ceramics, and composites. They are often lightweight, resistant to corrosion, and can be used in a variety of applications, from construction to electronics. These materials are essential in many industries due to their versatility and cost-effectiveness. For example, glass is a non-metallic material used in windows and containers, while rubber is commonly found in tires and seals. Their unique properties make them suitable for specific functions where metals may not be ideal.