AeroSeal duct sealing uses state of the art technology to seal your duct work from the inside with no cutting into your walls or floors to access ducts. The most common form of duct sealing on the market today is to hand apply tape or smear on a compound called Mastic. This method can only be applied to the duct work that is accessible. Why only do half the job. AeroSeal allows us to seal all the duct work no matter where it is.  Sealing duct work can drastically improve the functionality of a furnace or air handler