When it comes to sealing around joints in a duct system, water-based putty duct sealant is the ideal choice. It is easy to apply with a brush or caulking gun, and it is long-lasting and easy to clean. For fiberglass ducts, use fiberglass mesh tape for all joints. When attaching the duct to the trunk, make sure to properly seal the seam before repairing the roof.
Closure systems used with rigid fibrous glass ducts must comply with the UL181A standard and bear the marks 181A-P, 181A-M, or 181A-H. If the trunk is sealed against plaster and the duct system is relatively airtight, you won't need an airtight seal between the rack and the trunk. However, if you need to make an access hole in the gypsum joint from below, you can try using Sto's mesh tape or sticky material designed to seal air leaks at the seams of the coating. For round ducts, use UL181 aluminum tape for high temperatures in the duct section of a home appliance. If you are dealing with a common problem in homes with ducts under a slab, you can try all the usual remedies for drying the soil around a house such as improving the slope of the soil around the house so that there is a slope away from the foundation; installing gutters and conductive pipes that keep runoff away from the roof of your house. When it comes to sealing around joints in a duct system, it is important to choose the right materials and techniques for optimal results.
Water-based putty duct sealant is an excellent choice for sealing joints in fiberglass ducts, while UL181 aluminum tape is ideal for round ducts. Additionally, Sto's mesh tape or sticky material can be used to seal air leaks at seams of coatings. Finally, it is important to ensure that all slopes are away from your foundation and that gutters and conductive pipes are installed to keep runoff away from your roof.
