For industrial and commercial use on uninsulated stacks, boiler fronts, kilns, high-pressure steam lines, and other hot metal surfaces requiring a heat-resistant protective coating. HEAT RESISTANT ALUMINUM 11-61 offers excellent protection against weather and fumes in exposures including mild industrial and marine environments. Brilliant finish with good weathering characteristics in exterior exposures. Provides heat resistance up to 500ºF. Lead and chromate free.