I've lusted after some door curtains for years but they're expensive and I've got a bunch of doors I'd like to seal off. Currently, I use blue tarps and I'm always getting wrapped up in them. They work but are a pain in the rear.
A few months ago I was visiting a friend and he had some. When I commented on them, he said, "You know what they are don't you?....Clear carpet runners cut into strips." DUH!
What a great idea!
I wasn't able to find any locally that didn't have the spikes on the end but found these on Amazon.
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http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
$45 for 3x50' with free shipping. How many doors it will cover depends on your door size. I did about a 3" overlap with 12" wide strips. One box did 2 1/2 4x8 openings.
This is what they look like hung. I just stapled them in place for now. Ultimately, I'll probably do a more robust fastening...if they ever come off. It's pretty neat, you just walk right through them.
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They do a really good job of keeping the AC in the room and letting light out without having to slide doors of fight with a tarp.