- Sealing HVAC duct flange joints
- Joining flexible duct connections
- Closing gaps around air-handling units
- Sealing evaporator and condenser housings
- Refrigeration system panel joints
- Air-conditioning unit casing seams
- Insulating service openings in HVAC assemblies
- Sealing duct access doors and inspection panels
- Preventing air loss at ductwork interfaces
- Weatherproofing outdoor HVAC equipment connections

