Helium is the gas commonly used to fill balloons, giving them that buoyant, floating quality. how long does helium last in balloons? However, helium is a lightweight gas, and over time, it gradually escapes from balloons. The rate of helium loss depends on various factors, including the quality of the balloon and the surrounding conditions.

In general, helium-filled latex balloons tend to lose their buoyancy after about 12-24 hours, while foil balloons can last several days, sometimes up to a week or more. Factors like the size of the balloon, temperature, and the presence of any small holes can affect the duration. To prolong the float time of helium balloons, you can use a product called "Hi-Float," which forms a coating inside the balloon to slow down helium escape.