Liquid paint marker for high temperature resistance, The PRO-LINE® HT is a unique liquid paint marker engineered with industry-leading PrismaLock™ technology, which locks in colors for bright, bold marks that can withstand temperatures of up to 1,800°F (982°C). By using speciality pigments and resins, this fast-drying paint offers unparalleled durability and mark readability, with some colors retaining easily legible marks up to 2,200°F (1,204°C). Unique paint formula resists spreading and dries quickly through oily surfaces to leave precise, permanent marks. Xylene-free paint reduces user health risks and eliminates California Proposition 65, EPA HAPS and SARA 313 concerns in the U.S.A.. Durable metal barrel and nib reduce breakage for longer marking life. Easy-to-grip clip-cap allows for convenient pocket storage. Marking range: -46°C to 66°C (-50°F to 150°F) Heat treating. Annealing. Metal production. Metal fabrication. Welding. Glass production.