A 6 inch hvac ceiling vent was moved and reduced to 4 inch when adding a corner shower to a 2nd bathroom in my home. The output was weak duct was leaking air everywhere the tape looked like a blind guy applied it. I removed everything and did it myself. I resealed all the joints the tape sticks great I used a piece of wood dowel to smooth the tape all joints. Added duct seal the 4 inch vent output is better than the 6 inch was! First time I ever did this stuff.
XFasten Super Strong Duct Tape, White, 2" X 50 Yards Waterproof Duct Tape For Outdoor, Indoor, School And Industrial Use
33 Review
High Tensile Strength Duct Tape Silver, 5.8mils, 2 Inches x 50 Yards - All-Weather Duct Repair Tape for Commercial Use, Heavy-Duty Repair, Packing with Temperature and Shear Stress Resistance - XFasten
39 Review
TapePlus Gaffer Tape - Large 2 Inch X 40 Yards Roll - Versatile Black Tape For Gaffers, Ducts, Floors, And More
31 Review
Transparent Cross Strapping Tape: XFasten Filament Duct Tape 2X30 Yards - 3 Pack
29 Review