The answer to 'lifespan of air duct sealing' is that properly installed and maintained duct sealing can last 10-15 years on average. Duct sealing is a critical process that helps improve the efficiency and performance of your HVAC system by preventing air leaks in your ductwork. When done correctly, the sealants and tapes used will remain effective for a decade or more, saving you money on energy costs and helping your system operate at its best.
However, the actual lifespan can vary depending on factors like the quality of the materials used, the condition of the ductwork, and how much stress the seals are under. Extreme temperatures, moisture, and physical damage can all cause the seals to degrade faster. It's important to have a professional HVAC technician inspect and maintain your duct sealing over time to ensure it continues working effectively.