Originally developed for heating, ventilating and air conditioning (HVAC) applications, duct tape is
used today in a variety of maintenance, repair and construction settings. Our 3M™ Heavy Duty
Duct Tape 3939 was tested according to UL723, ASTM E84. Due to its unique design, it is an
excellent choice for general indoor application in MRO/construction. The tape can be used at
temperatures as high as 200°F for up to 30 minutes.