Applied a second coat of Duct Armor to all underground ductwork and the furnace box. The application involved thoroughly cleaning the surfaces before applying the duct sealant to ensure maximum adhesion and effectiveness. This coat provides an additional layer of protection against air leaks and thermal loss, improving overall system efficiency. After application, inspected the area for complete coverage and ensured that all ducts and connections were properly sealed. The system is now better insulated, enhancing its performance.