Helium balloons are great for birthdays, weddings, graduations, and corporate events. One question many customers ask is whether or not helium balloons can stay in a hot car. The answer is clear. Leaving helium balloons in a hot car can cause them to pop or become damaged.
In this blog our experts from balloonee explains the best way to transport helium balloons, and the reason they are damaging in the heat
Why Hot Cars Are Dangerous for Helium Balloons
Cars can heat up very quickly. Even on mild weather days, interior car temperatures can reach 120°F to 150°F (49 to 65 degrees Celsius) in minutes. Extreme heat is always damaging to balloons and they can shorten the lifespan of the helium filled balloons.
What Happens to Helium Balloons in a Hot Car
Helium Expands in Heat
Helium is a gas, and gases expand when exposed to high temperatures. In a hot car, the expanding helium increases pressure inside the balloon.
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Latex balloons overstretch and weaken
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Foil balloons build internal pressure and may split at the seams
Increased Risk of Balloons Popping
As pressure builds, balloons become unstable. Even slight movement inside the car can cause balloons to burst.
Reduced Float Time
Heat damages balloon material, allowing helium to escape faster. Even if the balloon does not pop, it may deflate much sooner than expected.
|
Balloon Type |
Heat Resistance |
Risk Level |
|
Latex Balloons |
Low |
Very High |
|
Foil (Mylar) Balloons |
Slightly Better |
High |
How to Safely Transport Helium Balloons
If you need to transport helium balloons by car, follow these guidelines:
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Turn on air conditioning before loading balloons
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Keep balloons away from windows and direct sunlight
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Transport balloons as close to the event time as possible
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Avoid overcrowding the vehicle
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Use balloon bags or light coverings to reduce heat exposure
What Not to Do
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Do not leave helium balloons in a parked car
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Do not place balloons on dashboards or near glass surfaces
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Do not transport balloons long distances without air conditioning
Why Balloons Shrink After Being in a Hot Car
When a balloon is in a hot environment and is then moved to a cool area, the helium inside is going to contract, making it appear smaller. Some balloons may be able to re-expand to a normal size once the temperature increases to a normal room temperature. However, their float time will be significantly decreased and repeated exposure to heat will cause the balloon to lose their ability to float.
Final Answer: Can Helium Balloons Stay in a Hot Car?
No, you should not leave helium balloons in a hot car. Helium expands with heat, increasing the chances of bursting balloons, heat weakens balloon materials, and float time is significantly reduced.Balloon stay in a cool air-conditioned location with a vent and away from direct sunlight up until your event for the best outcome.
