Blimp Envelopes

I am looking to build a blimp based off arduino (kind of like blimpduino), and was wondering where people generally bought their envelopes from, and what they recommended.

Also wondering how quickly the helium manages to seep out of some of these envelopes.

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ModeratorPermalink Reply by Chris Anderson on January 13, 2011 at 6:48pm
RCToys is a good source. The mylar blimps can stay well inflated for a week or more.
Permalink Reply by narwhal on January 13, 2011 at 7:29pm
Thanks for the quick reply Chris. Before I go and buy one I thought I'd ask whether there are "premium" envelopes that can hold there inflation for a longer time, I would be willing to pay significantly more to get this kind of inflation duration. If not is there any kind of coating that I can put over the envelope to help the helium stay in there (that obviously doesn't affect the payload too much)?

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