This blue valve-action paint marker is designed for marking stainless steel, alloy metals, and superalloys where corrosion, pitting, or degradation must be avoided. Its xylene-free, fast-drying paint produces wear-, weather-, and UV-resistant marks across a marking range of -50°F to 150°F (-46°C to 66°C). Low-melting-point metals, sulfur, and halogens are controlled to stated limits, with individual lot analysis and certification available for reference.