Karnak #27 Fibered Perfectseal Aluminum Exterior Coating is made of selected asphalts and pigment flakes of pure aluminum, blended with petroleum solvents and mineral fibers. When Karnak #27 Fibered Perfectseal Aluminum Exterior Coating is applied to the roof, forming a reflective, the aluminum flakes leaf to the surface, metallic shield over the base material. Asbestos Free!