Shurtape sf685-3spt Butyl Foil Mastic Tape 3in X 100ft

Product Description

The SHURTAPE sf685-3spt is a butyl foil roll mastic tape engineered for sealing sheet metal and PVC-coated ductwork in both indoor and outdoor HVAC applications. Measuring 3 inches wide by 100 feet per roll, it delivers a permanent, waterproof bond to duct substrates without requiring heat activation. The foil backing stays supple after application, conforming to irregular surfaces and maintaining adhesion across temperature cycles. HVAC technicians and sheet metal workers reach for this tape when a durable, code-appropriate mastic-style seal is needed on supply and return duct systems. It contains no asbestos, CFCs, or PCBs, making it compliant with current indoor air quality standards.

The sf685-3spt is suited for residential and light commercial HVAC duct sealing where sheet metal joints, seams, and connections require a weatherproof, long-lasting seal. The tape is approved for use on both sheet metal and PVC-coated duct assemblies, making it versatile across common duct construction types. It is paintable using paint formulated for aluminum surfaces, which supports finished installations in exposed mechanical spaces. The 100-foot roll length reduces the need for frequent roll changes during larger duct-sealing runs.

Key Features

• Butyl foil construction provides a waterproof, permanent bond to duct substrates
• Stays supple after application, conforming to irregular duct surfaces and seams
• Suitable for both indoor and outdoor duct sealing environments
• Paintable with aluminum-compatible paint for finished mechanical installations
• Contains no asbestos, CFCs, or PCBs
• 3 inches wide by 100 feet per roll for efficient coverage on larger jobs

Compatibility

Designed for use on sheet metal ductwork and PVC-coated duct assemblies in residential and commercial HVAC systems.

Installation Notes

Installation is typically performed by licensed HVAC technicians or sheet metal workers. Before applying, clean and dry the duct surface to remove dust, oil, and loose debris for maximum adhesion. Power down the air handling system before working on pressurized duct sections. Follow local mechanical codes and SMACNA guidelines for duct sealing requirements in the applicable jurisdiction.

Technical Specifications

• Width: 3 inches
• Roll Length: 100 feet
• Tape Type: Butyl Foil Mastic
• Backing: Foil, waterproof
• Paintable: Yes, with aluminum-compatible paint
• Asbestos / CFC / PCB Content: None
• Manufacturer Part Number (Alt): 200666

Standard Information

• Brand: SHURTAPE
• Manufacturer Part Number: sf685-3spt