What is one material used to seal the connections of duct work?

The use of tape that is compliant with UL181 refers specifically to a form of tape that is designed for sealing duct connections, particularly in heating and air conditioning systems. This tape is tested and rated for its ability to withstand temperature fluctuations, moisture, and other environmental factors commonly encountered in ductwork systems. UL181 tape has adhesive properties that ensure a strong bond and create an airtight seal, which is essential for the efficiency and effectiveness of HVAC systems. Ensuring that joints in ductwork are properly sealed minimizes air leakage, helping to maintain system efficiency and reduce energy costs.

While other materials like PVC and Ultrabond have their own applications in construction and sealing, they are not specifically recognized or rated for duct sealing purposes in the same way UL181 tape is. Duct tape, which is often thought of for various household tasks, is not designed for the rigid sealing requirements of mechanical ductwork and may degrade or fail over time when exposed to the conditions present in ducts. Therefore, the selection of UL181 tape is the most appropriate choice for sealing connections in ductwork due to its reliability and compliance with industry standards.