Yes, you can use black fiberglass tape to make a window screen or blind. Fiberglass tape is strong, durable, and resistant to weather and UV rays, making it suitable for outdoor use. To create a window screen, you can use the tape to secure a mesh material to a frame. For a blind, you might weave the tape in a pattern to create slats. However, ensure the tape is of high quality and the mesh is appropriately sized for the window. Always follow safety precautions when working with tools and materials.