 oh not to worry duct tape is still a thriving enterprise in spite of the fact that aeroseal has rendered its original purpose obsolete well i feel kind of bad about that but it just goes to show how amazing aeroseal really is duct sealing from the inside who to thunk it that's right we locate and plug all those tiny cracks and holes that duct tape and traditional duct sealants can't that way all of your cool comfortable air stays inside where it belongs so keep