The lifespan of black fiberglass tissue can vary significantly based on its application and environmental conditions. In general, when properly maintained and not exposed to extreme conditions, black fiberglass tissue can last for several years, often ranging from 5 to 15 years. However, factors such as UV exposure, moisture, and physical wear can reduce its lifespan. It's important to note that the quality of the fiberglass and the specific manufacturing process can also impact its durability.