LA-CO Industries is a family-owned global manufacturing company specializing in the manufacturing of industrial hand-held markers, plumbing chemicals, 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.

Today, LA-CO Indsutries is proudly celebrating 80 years of high-quality in the industrial, plumbing, temperature indication, and farming industries.

Our LA-CO brand of high-quality, high-performance plumbing and HVAC chemicals is a trusted partner for professional contractors around the world. From homes to skyscrapers to the United States' National Archives Building in Washington D.C., LA-CO-branded high-performance thread sealants, fluxes, heat protection products, and repair sealants protect history's important documents and maintain the world's precious natural resources