When it comes to sealing air ducts, there are several options available. Duct Tape is a very versatile type of adhesive tape and is a staple for many DIY projects, but it should not be used to seal HVAC ducts. Adhesive or aluminum tape is a better choice for this job. If you are thinking of sealing all the ducts in your house, then silicone sealant is an excellent option.
Putty can be applied generously to duct joints and leaks to ensure that the seal doesn't break down over time.
Butyl Foil-Grip Tape
is also recommended by Hardcast for use on galvanized steel ducting, duct panels, or flexible ducting. Cleaning the ducts and then installing putty and insulation in them is also a good plan. When selecting a sealant for air ducts, it is important to choose a high-quality product and clean the application area first.Putty sealant and aluminum foil tape are both excellent options for sealing air ducts. Putty can be used to seal the boots from the attic floor and then seal the boots to the ceiling of your living room (before putting the grills back in place). Butyl Foil-Grip Tape is also a great choice for sealing galvanized steel ducting, duct panels, or flexible ducting. Leaking ducts can cause distant rooms to receive less airflow than intended by the duct designer.
To prevent this from happening, it is important to make sure that each section of the duct is sealed with the next, as well as the joints of each duct. Silicone sealant is an ideal option for longitudinal sealing joints in round galvanized ducts. If the trunk is sealed against plaster and the duct system is relatively airtight, then an airtight seal between the rack and the trunk will not be necessary. It is essential to use high-quality products when sealing air ducts.
Duct Tape should never be used for this purpose as it won't hold up and leaves a residue when removed. Adhesive or aluminum tape, putty sealant, silicone sealant, and Butyl Foil-Grip Tape are all excellent alternatives to Duct Mastic that can be used to ensure that your air ducts are properly sealed.