01/03/2023
When properly applied, mastic is your best option for duct sealing. After painting it onto all the leaky areas and filling in the gaps, mastic hardens and forms a perfect (if you did it right) air barrier. Unlike most tapes, mastic won't deteriorate and lose its adhesion over time. It's a permanent solution that lasts as long as your ductwork, so you can maximize the benefits of duct sealing!