👉 Incombustible refers to a substance or material that is not capable of igniting when heated, even at high temperatures. This means that it does not release any heat or smoke when burned and remains completely combustible until it comes into contact with oxygen. Some examples of materials that are incombustible include metals like copper and aluminum, glass, plastic, and some types of wood. These materials can be used to make various products such as pipes, wires, and insulation.