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The CARLISLE HARDCAST 310364 is a seam tape designed for sealing and reinforcing joints, seams, and connections in duct systems and related HVAC assemblies. Supplied in a 3-inch-wide by 25-foot roll, it provides a workable length for both retrofit service calls and new installation work. At 5.75 pounds per roll, the product offers substantial material per unit, making it suitable for covering multiple seams on a single job. HVAC technicians and sheet metal contractors use this tape to achieve airtight connections that maintain system efficiency and meet duct sealing code requirements.
This seam tape is applied in residential and light commercial HVAC duct fabrication and repair. It is suited for sealing longitudinal seams, transverse joints, and fitting connections on ductboard, flex duct, and rigid fiberglass duct assemblies. The 3-inch width accommodates standard seam widths without requiring additional overlapping passes, making it efficient for high-volume duct work on new construction and service replacement jobs alike.
Designed as an OEM-style seam tape for use on fiberglass ductboard, flex duct, and rigid duct assembly seams and joints in residential and light commercial HVAC applications.
Installation is typically performed by licensed HVAC technicians or sheet metal contractors. Before applying, ensure the duct surface is clean, dry, and free of dust or debris to achieve full adhesion. Power down the air handling system before working on duct sections to prevent air pressure from interfering with tape seating. Local mechanical codes, including SMACNA and energy code duct sealing requirements, should be referenced to confirm acceptable sealing methods for the application.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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