This Nashua 555 FlexFix is a professional-grade, UL 181B-FX listed film tape designed for sealing and joining connections in flexible ductwork and HVAC systems. It features a tough biaxially-oriented polypropylene (OPP) backing that is hand-tearable for quick installation and a high-performance acrylic adhesive that maintains an aggressive bond in extreme temperatures ranging from -40°F to 212°F. Ideal for sealing flexible ducts, dryer vents, and reflective insulation, this metallic-colored tape is mold and moisture resistant with low VOC content, making it suitable for sustainable building projects

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