Nashua 557 PRO-GRADE is UL code approved for sealing Class 1 flexible (181B-FX) duct joints and connections. With a polyethylene-coated cloth backing printed for easy inspection and a durable rubber adhesive, Nashua 557 is the ideal choice for sealing flexible duct work, dryer vents, and for heavy-duty household repairs. Nashua Trusted Tapes get the job done right, the first time, every time.
Advanced closure system for class 1 flexible air ducts and air connectors
Seals dryer vent connections and perform heavy-duty household sealing and repairs
Premium rubber adhesive provides permanent air-tight bonds
Aggressive bonding, protecting, bundling, and repair applications
Excellent bond to sheet metal and other surfaces
Resistant to moisture and mold growth
Can contribute toward satisfying EQ credit 4.1 (low emitting materials) under LEED
Low VOC (Volatile Organic Compound) content