CerMark Ultra is a premium grade, ultra-fine permanent laser marking spray. This fast drying, non-ozone depleting aerosol is engineered to produce deep, clear, black markings on almost any surface. CerMark Ultra is a permanent, non-fluorescent marking spray. This product is not recommended for use on fabrics. Improve your lasered work with Cermark Ultra. Formulated to work on metal, ceramics, glass, stone, brick, slate, and more (not intended for painted items, wood, or plastic). Cermark Ultra improves the laser bonding in every way and will improve the lasering quality on almost any surface.