The industry original, Markal Heat Stik (Old H Paintstik) hot surface solid paint marker is a high temperature metal marker used in steel mills to mark on hot surfaces from 225°F to 1100°F (107°C to 593°C). Ideal for marking coils, billets, plates, castings and forgings, the long-lasting marks will not run, char, discolor, peel, or crack. 81022 81020 81020 81023 81025 81026