Duct tape is a great to to seal off a HVAC duct. The tape is strong and works effectively for your needs. Duct tape can offer a tight seal for your duct.
Plumbers tape is generally a very thin white tape also called thread tape and PTFE tape. It is used on threads to seal joints.
no
Get some tape and tape it down OR just tuck it under.
Tape only loses it's stickiness when is it very warm. The water vapor evaporates, and then the tape can't stick to anything.
MANY things. Duct tape can seal cracks in ducting - it's original purpose. It can join different pipes and seal them. It can be used to attach a number of things together.
Duct tape was first designed to seal ammunition boxes protecting the contents from water and mud .
duct tape
You can remove it, and tape the threads with latex tape to make a better seal, or change out the washers. Depends on where the leak is.
No, teflon tape (and pipe dope, for that matter) should never be used on flare fittings. They are designed to seal without tape or dope, and may actually leak if tape or dope is used.
Pipe joint compound or Teflon tape
While there are Teflon lubricants, Teflon (PTFE) thread seal tape is most definitely for sealing threads. There are relevant standards for these and they are UL listed for such use. Typically for propane & natural gas you would want to use yellow thread seal tape. It is thicker than the standard white. I prefer it over "pipe dope" as it does not harden up with time, and it is guaranteed to have even coverage. In addition to it's ability to seal, the lubricating effects of the tape allow easier tightening of joints, further reducing the liklihood of a leak.