LA-CO, a brand of Markal, is a leading manufacturer of high quality plumbing and HVAC chemicals. Our products include thread sealants, fluxes, heat protection products, and sealants. Our products are trusted all across the country in all kinds of buildings, from homes to skyscrapers. Professional contractors trust LA-CO Products and you should too. Visit our website to learn more about our full catalog of products or to talk to a sales representative.