FlexFix Tape UL 181B-FX

$502.20 / Package

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$13.95 / Roll

A package contains 36 Rolls

Color: Silver

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High-Performance HVAC & Insulation Sealing Tape is engineered for professionals who need a durable, UL-listed closure solution for flexible duct connections, reflective insulation, and metal-to-metal joints.
This contractor-grade tape combines a tough OPP backing with a high-tack acrylic adhesive that resists mold, moisture, and temperature variations. Designed for long-lasting bonds and easy handling, it delivers outstanding performance in HVAC, refrigeration, and general sealing applications.


Key Features & Benefits

Tough OPP Backing – Ensures exceptional strength and durability for demanding installations.
Hand-Tearable Design – Allows quick, easy application without tools.
High-Visibility Print – Red on metallic or white on black for easy inspection and identification.
Acrylic Adhesive (Solvent-Free, Low Odor) – Delivers a strong, aggressive bond that’s environmentally friendly.
Mold & Moisture Resistant – Maintains adhesion and seal integrity even in humid conditions.

UL 181B-FX Listed – Meets HVAC code requirements for flexible duct closure systems.
LEED® Compatible – Low-VOC formulation may contribute to EA Credit 1 (Optimize Energy Performance) and EQ Credit 4.1 (Low-Emitting Materials).
Global Availability – Trusted by HVAC professionals and insulation contractors worldwide.


Ideal For

Sealing and joining UL-listed flexible, non-metallic air ducts
Reflective and bubble insulation sealing
Metal-to-metal joints in HVAC and refrigeration systems
Dryer vent and bath fan duct sealing

  • SIZE: 1.89 in x 120 yd (48 mm x 110 m)
  • SPEC: UL 181B-FX Listed
  • BACKING: BOPP (OPP) – tough & hand-tearable
  • ADHESIVE: Acrylic – solvent-free, low odor, high tack
  • THICKNESS: 3.1 mil
  • PERFORMANCE: Mold & moisture resistant; -40 to 212 °F
  • VISIBILITY: High-contrast print (red on metallic, white on black)
  • USE: Flexible duct closure, reflective/bubble insulation, metal-to-metal joints, dryer & bath fan ducts

Customer Reviews

Customer Reviews

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B
Ben M
Great product, Highly recommend!

So glad you brought this product in! Definitely one of the items I use the most in my business. You can tell you’re true professionals - keep it up!

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