Air Leaks in HVAC Systems: How Duct Joint Sealants Solve the Problem

Selecting High-Temperature Resistant Insulated Ventilation Duct Metal Sheets: Which One Best Suits Your Project?

Heat-resistant insulated ventilation ducts are typically constructed from various metal sheets, each offering distinct advantages for HVAC applications. Below are common sheet materials:

1. Galvanized Sheet

Galvanized sheet is cold-rolled low-carbon steel coated with a zinc layer, offering high strength and toughness. It is suitable for standard indoor dry environments as HVAC ductwork.

2. Stainless Steel Sheet

Stainless steel sheet features corrosion resistance, aesthetic appeal, and high-temperature tolerance. It is commonly for ductwork in high-temperature and corrosion-prone environments, as well as in premium ventilation systems.

3. Aluminum Sheet

Aluminum sheet offers lightweight properties and corrosion resistance, making it suitable for indoor ventilation ducts in humid environments like coastal areas.

How to Select Leak-Proof Ventilation Duct Joint Sealants?

Choosing the appropriate ventilation duct adhesive requires consideration of the following factors:

High-Temperature Resistance: The duct sealant must withstand significant temperature fluctuations within the ductwork to prevent chemical changes in its composition caused by heat, which could compromise sealing performance.

Flexibility: Duct materials expand and contract with temperature changes. The sealant must possess sufficient flexibility to accommodate these movements without cracking or losing adhesion.

Strength and Durability: The duct sealant caulk​ must exhibit adequate strength and durability to withstand the operational pressures of the ventilation system.

Mold Resistance: Ventilation systems often operate in humid environments. The adhesive should resist mold growth to prevent compromising sealing integrity and aesthetic appearance.

Acrylic Duct Sealant – Efficient and Reliable Engineering Solution

Acrylic duct sealant is a water-based sealant suitable for medium-to-high pressure duct systems. It offers permanent flexibility, outstanding waterproofing performance, and exceptional sealing strength. With low volatile organic compound (VOC) content and minimal odor, it is ideal for indoor duct sealing projects.

Tengyu TA102 Water Based Duct Mastic Sealant​

TA102 Latex duct sealant is a specially formulated product featuring permanent flexibility, outstanding waterproofing performance, and exceptional sealing strength. With low volatile organic compounds (VOC) and odorless properties, it is suitable for sealing various HVAC ducts, including metal sheet ducts, duct panels, flexible ducts, sealing seams in metal products, and treating socket and flange joints.

Common Applications of Ventilation Duct Joint Sealants

• Sealing Seams: A primary use in ventilation systems is sealing joints between duct panels to prevent air leakage.
• Connecting Fittings and Accessories: Used to attach elbows, tees, reducers, and other fittings to the main ductwork system.
• Duct System Repairs: The adhesive can also be used to repair existing ductwork systems. Whether patching small holes, cracks, or larger areas of damage, the adhesive restores the duct’s integrity.

Selecting the appropriate duct sealant is key to ensuring long-term leak prevention and stable operation in HVAC projects. Contact duct sealant manufacturers​ immediately for professional installation advice and the most suitable duct sealant solution for your project.