Shurtape SF 685 General Purpose Butyl Rubber Foil Tape

Got a roll of Shurtape SF 685 butyl rubber foil tape here. It's the 3 inch by 100 foot size. This stuff is great because it's actually hand-tearable so you dont have to fumble with a knife while you're working. It's waterproof and permanent, good for sealing up ducts or whatever else you need a solid seal on. Brand new in the plastic.