You can get Hi-Float from specialized balloon suppliers. One of my favorite shops is Shindigz.com. They sell a 16oz container of Ultra Hi-Float for $17.99.
The bottle will cover about 100 11" balloons.
Hope that helps,
Margit
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latex jhelium balloon duration by: Anonymous
thank u joey,
wher du I get the stuff to make them last longer
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Duration if helium balloons by: Joey W
HI
If you are using foil balloons they will last about 2 to 4 weeks. If you are using latex balloons thay will last for a short amount of time. But there is a product out there that is called Ultra Hi-Float. I use it at my balloon shop and clients LOVE it.
A 11" latex balloon will last 12 to 24 hours but with Ultra Hi-Float it will last 72% Longer. I have balloons in my shop that I filled the 19th of last month and they look just like I filled them today