We chemically treat our balloons with a concoction of goop with allows them to float about 4-5 days. Without this treatment, they last maybe 6 measly hours. We always treat our balloons because we want to give you maximum value and enjoyment for your money.
You didn't ask, but mylar (also called foil) balloons can float for weeks. I know because have one I can't reach on my ceiling right now that I inflated about three months ago.
The longest floating balloons are made from foil or plastic. They will remain full and float for 7 to 14 days on average. Latex rubber balloons will float for varying times.
The larger the balloon, the longer its floating time. A liquid sealant, Hi-Float, can be used to extend the float time by coating and sealing the inner surface of any latex balloon larger than 9". We automatically treat all of our helium filled latex.
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