Black fiberglass tissue can be used for both indoor and outdoor applications. It is known for its durability, strength, and resistance to various environmental conditions. For indoor use, it is often utilized in construction and insulation. Outdoors, it's used in applications where weather resistance and durability are needed, such as in roofing, siding, and other exterior building materials. However, it's important to ensure that the specific product is rated for the intended environment to guarantee performance and longevity.