Diversitech 640-fsk3 Fsk Foil Scrim Tape 3in X 150ft

Product Description

The DIVERSITECH 640-fsk3 is an FSK foil scrim tape designed for sealing and joining ductboard insulation systems. The tape combines a foil facing with a scrim and string reinforcement layer, delivering a durable, vapor-retarding seal at ductboard joints and seams. At 3 inches wide and 150 feet per roll, it provides substantial coverage for new installations and retrofit work. HVAC installers and sheet metal mechanics rely on this tape to maintain system integrity and comply with insulation facing requirements on fibrous ductboard assemblies.

This tape is applied to ductboard panel joints, edges, and penetrations in residential and light commercial HVAC duct systems. The FSK construction — foil, scrim, and kraft layers — matches the facing material used on standard ductboard panels, making it the correct choice when closing out or repairing FSK-faced duct assemblies. It is commonly used during new construction ductwork fabrication and duct renovation projects where maintaining a continuous vapor barrier is required.

Key Features

• FSK construction with reinforcing scrim and string layer for added tear resistance
• 3 inches wide for full coverage across standard ductboard joints and seams
• 150-foot roll length reduces changeouts on large jobs
• Foil facing acts as a vapor retarder consistent with ductboard panel facings
• Designed specifically for use with ductboard such as AF984CT panels

Compatibility

Designed for use with FSK-faced ductboard panels including AF984CT ductboard. Suitable for sealing joints, seams, and edges on fibrous glass ductboard assemblies in residential and light commercial HVAC applications.

Installation Notes

Installation is performed by licensed HVAC technicians or sheet metal mechanics during ductwork fabrication or repair. Shut down the air handling system before servicing duct sections. Surface must be clean, dry, and free of dust or oils for proper adhesion. Follow local mechanical codes and manufacturer guidelines for ductboard joint sealing requirements.

Technical Specifications

• Type: Duct Tape
• Width: 3 inches
• Length: 150 feet
• Construction: FSK Foil with Scrim and String Reinforcement

Standard Information

• Brand: DIVERSITECH
• Manufacturer Part Number: 640-fsk3