Vybond 557B2 UL181B-FX Cloth Duct Tape Black 2 in 10 Mil 60 Yd

Product Description

The VYBOND 557B2 is a UL181B-FX listed cloth-backed duct tape designed for code-compliant sealing of HVAC flex duct systems. It features a polyethylene-coated cloth backing paired with a rubber-based adhesive that delivers approximately 50 ounces per inch of adhesion to steel. The tape is 2 inches wide, 10 mils thick, and supplied in a 60-yard roll. Its operating temperature range of 40 degrees F to 200 degrees F covers typical duct installation environments. This product is intended for HVAC technicians and sheet metal contractors who require a UL-listed cloth tape format for flex duct closure and sealing work.

The 557B2 is suited for residential and light commercial HVAC duct applications where UL181B-FX compliance is required by local mechanical codes. It is used to seal longitudinal seams and connections on Class 1 flexible air ducts and flexible air connectors. The cloth construction and rubber adhesive provide conformability on irregular duct surfaces, making it a practical choice for service techs working in tight attic or crawl space installations where a reliable cloth tape format is preferred over mastic or foil alternatives.

Key Features

• UL181B-FX listed for code-compliant flex duct sealing
• Approximately 50 oz/in adhesion to steel for dependable bond strength
• PE-coated cloth backing provides conformability on irregular duct surfaces
• Rubber-based adhesive performs across a 40 degrees F to 200 degrees F operating range
• 10 mil total thickness for durability in duct sealing applications
• 60-yard roll length reduces mid-job roll changes on larger installs

Compatibility

Designed as a UL181B-FX compliant closure tape for Class 1 flexible air ducts and flexible air connectors in residential and light commercial HVAC duct systems.

Installation Notes

Installation should be performed by a licensed HVAC technician or sheet metal contractor in accordance with local mechanical codes and SMACNA duct construction standards. Shut down the air handling system before sealing duct connections. Surfaces should be clean and dry before tape application to ensure full adhesive contact. Consult the applicable mechanical code for required overlap and closure requirements when using UL181B-FX listed tape on flex duct connections.

Technical Specifications

• Listing: UL181B-FX
• Backing Material: PE-coated cloth
• Adhesive Type: Rubber-based
• Adhesion to Steel: Approximately 50 oz/in
• Total Thickness: 10 mil
• Width: 2 inches
• Roll Length: 60 yards
• Color: Black
• Operating Temperature Range: 40 degrees F to 200 degrees F
• Quantity per Unit: 1 roll

Standard Information

• Brand: VYBOND
• Manufacturer Part Number: 557B2