This red certified valve-action paint marker is designed for stainless steel, alloy metals, and superalloys used in welding, aerospace, nuclear power, and other power-generation applications where corrosion, pitting, or degradation must be prevented. It marks across a temperature range of -50°F to 150°F (-46°C to 66°C), and its fast-drying paint leaves wear-, weather-, and UV-resistant marks. The xylene-free formula has less than 200 ppm sulfur and total halogens, with low-melting-point metal content below 300 ppm total and 250 ppm per metal; listed standards include U.S. Navy C3070, MIL-STD-2041D, and EDF PMUC.