Duck Brand UL 181B-FX Flex Foil Duct Tape

Professional-Grade Sealing for Flexible Ducts

Duck Brand UL 181B-FX Flex Foil Tape delivers a powerful combination of aluminum’s protective strength and Duck’s legendary adhesive performance, making it the ideal choice for sealing flexible air ducts. UL-listed for flame spread and smoke development, this silver foil tape ensures compliance with strict building codes while providing a durable, long-lasting seal. Its pressure-sensitive adhesive clings easily to metal, plastic, and other duct materials, offering the convenience of traditional tapes without sacrificing performance.

Designed for use in temperature ranges from **-10°F to +210°F**, this tape handles both extreme cold and high-heat environments—ideal for HVAC systems in residential, commercial, or industrial settings. Whether you’re installing new ducts or repairing existing systems, Duck Brand Flex Foil Tape provides the reliability contractors and DIYers trust for airtight, code-compliant installations.