Professional results that a DIYer can be proud of begins with 557 Pro-Grade UL Listed Duct Tape by Nashua. This UL Listed tape 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 Tape. Trusted by professionals. DIY approved. Count on Nashua to get the job done right.
Natural rubber adhesive provides a long-lasting durable bond to a variety of surface types
UL181B-FX Listed
Low VOC content
Can contribute toward satisfying EQ credit 4.1 (low emitting materials) under LEED
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