LA-CO Industries is a fourth-generation, family-owned global manufacturing company specializing in the manufacturing of industrial hand-held markers, plumbing chemicals, temperature indication tools, and livestock identification products. Since 1934, we have taken pride in the design and manufacturing of high quality, performance-based products for our customers’ unique applications. With locations in both, Elk Grove Village, IL and Blyes, France, LA-CO Industries and its brands serve distributors in over 70 countries worldwide.