ArmorDillo HVAC Vent Film Duct Masking Tape Temporary Register Sealing Tape (12” x 185ft) Film is designed as a temporary closure to protect uninstalled and partially installed ductwork from contaminants such as dirt, dust, and other particulates that can accumulate in the duct that can lead to poor indoor air quality. It is highly conformable and puncture resistant. Product Details UV stable Highly conformable Puncture-resistant Clean, residue-free removal Satisfies SMACNA guidelines for duct cleanliness level C (Advanced) Can be used as part of LEED EQ 3.1 Construction IAQ Management Plan Reduce dust and debris traveling through duct work on the job Protect ducts and vents during installation on new construction Removes cleanly without residue Interior and exterior use Durable HVAC film NOTE: All adhesive products require s certain amount of “dwell time” before they stick properly. For instance, if you apply any tape to a surface and you rip it off right away, it doesn't seem to stick very well. If you leave it on for a couple of minutes, the adhesive has had a chance to “wet-out” properly and it will feel much stickier. If you try to peel it off after a day, it will be stickier still.