Permalac NT Black is our low-VOC, opaque black acrylic lacquer formula designed to yield a rich, dark tint when applied to any metal, wood, stone, or concrete substrate. It is a 2-in-1 product that combines a "cast iron" black look with the durability and protection of our award-winning clear Permalac base. It is fast-drying, easy to apply, and highly resistant to environmental breakdown caused by UV, acid rain, and salt. It has outstanding adhesion to various substrates, including patinated and polished metals, hardwood, masonry, or stone products. Users report excellent results on copper, brass, bronze, steel, aluminum, zinc, and painted wood substrates. Available in semi-gloss, satin, matte, and ultra-flat finishes in the Permalac NT line. One gallon of Permalac covers approximately 400 square feet in a single coat. This is a 4-quart bundle. Safety and technical data pages are available here. Certificates of analysis are available here.