Can Legos Melt in a Hot Car? (When Do They Melt?)

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Oh, the joys of building with Legos! There’s just something so satisfying about connecting those colorful bricks to create your very own masterpieces. But have you ever wondered if your precious Lego creations could fall victim to the sweltering heat of a hot car?

I mean, seriously, having trouble with melting Legos? The thought alone is enough to make any Lego enthusiast break out in a cold sweat!

But will Legos actually melt if you leave them in the car?

Legos WILL NOT melt inside of a hot car as their melting temperature is 221 degrees Fahrenheit and the inside of a car won’t get that hot. However, Legos can start to warp or become deformed at 176 degrees.

So although the inside of your vehicle is unlikely to reach 176 degrees (even on the hottest days in Arizona) if you live in a desert in another country it might be possible for Legos to begin to warp in a car… but not melt.

Hang in there, dear reader! In the rest of this article, we’ll dive headfirst into the world of Legos and heat exposure, You’ll find everything you need to know including tips for preventing any potential damage.

So buckle up, Lego fans, because we’re about to embark on a wild and informative journey!

History and Composition of Lego Bricks

A Brief History of the Lego Brand and its Evolution

Let’s take a trip down memory lane! The Lego brand was born in 1932 when Danish carpenter Ole Kirk Kristiansen started making wooden toys in his workshop. The name “Lego” comes from the Danish words “leg godt,” which mean “play well.”

Talk about a fitting name!

Over the years, the brand has grown into an international phenomenon, with its plastic bricks becoming synonymous with creative play. Oh, the places we’ve gone with Legos!

Types of Plastic Used in Lego Manufacturing

Lego bricks have come a long way since their wooden beginnings. Today, they’re made primarily from a plastic called acrylonitrile butadiene styrene (ABS).

Quite a mouthful, isn’t it?

This material is known for its strength, durability, and ability to maintain its shape and color over time. But fear not, eco-conscious builders! Lego has also started using plant-based plastics derived from sugar cane to create more sustainable, Earth-friendly bricks.

Hooray for Mother Nature!

Key Characteristics of ABS Plastic

ABS plastic is the star of the show when it comes to Lego bricks, and for good reason! It boasts a number of impressive properties that make it the ideal material for our beloved building blocks:

  • Strength: ABS is known for its impact resistance, which means your Legos can withstand quite a bit of rough play without breaking or cracking. Phew!
  • Durability: With proper care, ABS plastic can last for many years without showing signs of wear and tear. The gift that keeps on giving!
  • Color Retention: You can say goodbye to faded bricks, as ABS plastic maintains its vibrant hues even after years of use. Color me impressed!

Understanding the Melting Point of Legos

Definition of Melting Point and Its Relevance to Legos

So, what exactly is a melting point? It’s the temperature at which a solid becomes a liquid. Sounds simple enough, right?

In the case of Legos, the melting point is crucial because it determines how much heat our beloved bricks can withstand before turning into a gooey mess. Yikes!

Understanding the melting point of Legos is the key to keeping your creations safe from the clutches of heat-related disasters.

The Melting Point of ABS Plastic

Are you ready for some science, Lego lovers? The melting point of ABS plastic, the primary material used in Lego bricks, is 221 degrees Fahrenheit (105 degrees Celcius).Talk about hot stuff!

But don’t get your bricks in a twist just yet, because the temperature inside a car would have to get pretty toasty to hit those scorching highs.

Factors Affecting the Melting Point of Legos

It’s not all cut and dry when it comes to the melting point of Legos, my friends. A number of factors can influence how much heat those nifty bricks can handle before they start to soften:

  • Color: No, your eyes aren’t deceiving you! Some colors of Legos can actually withstand higher temperatures than others due to variations in the pigments used. So it might be wise to think twice before leaving your red-hot masterpiece in a sun-drenched car.
  • Age: As Legos age, they can become more susceptible to heat damage. Ain’t that the truth! So you might want to take extra care with those vintage bricks that have been passed down through the generations.
  • Exposure Time: It’s not just the temperature that matters, but also how long your Legos are exposed to the heat. A short stint in a warm car might not spell disaster, but leaving them in there for hours on end? You’re playing with fire, my friend!

How Hot Can a Car Get in the Sun?

The Greenhouse Effect in a Car

Remember those sweltering summer days when you’ve climbed into your car, only to be greeted by a blast of hot air that makes you feel like you’ve entered the fiery pits of doom? Oh, the horror!

That’s the greenhouse effect at work! When sunlight enters your car through the windows, it gets trapped inside, causing the temperature to soar.

So how hot can it get? Let’s find out!

Factors that Influence the Temperature Inside a Parked Car

  • Outside Temperature: It’s a no-brainer that hotter days will lead to higher temperatures inside a parked car. Who would’ve guessed?
  • Sunlight: A car parked in direct sunlight is going to heat up much faster than one parked in the shade. Shady business, indeed!
  • Window Tint: Tinted windows can help to reduce the amount of sunlight that enters your car, keeping the temperature down. Looking cool while staying cool!
  • Car Color: Dark-colored cars absorb more heat than their lighter counterparts. So, choosing a white car might not be such a vanilla decision after all!

Highest Recorded Temperatures Inside a Car

Ready for some mind-blowing facts? Studies have shown that on a scorching 32 degrees Celsius (90 degrees Fahrenheit) day, the temperature inside a parked car can rocket to a sweltering 49 degrees Celsius (120 degrees Fahrenheit) in just 20 minutes. Yowza!

And if that’s not enough to make you sweat, after an hour, the temperature can climb as high as 60 degrees Celsius (140 degrees Fahrenheit). Now that’s hot enough to fry an egg, but it still isn’t hot enough to melt your precious Legos!

Comparing Car Temperatures to the Melting Point of Legos

Analyzing the Likelihood of Legos Melting in a Hot Car

Given the information we’ve gathered so far, it seems that the temperature inside a hot car can indeed reach heights that could potentially cause our beloved Legos to warp or become disfigured slightly… but not melt Gasp!

But before you start panic-building an underground bunker for your Lego collection, let’s take a closer look at the likelihood of any disfiguring actually happening.

  • Typical Car Temperatures vs. Melting Point: While the temperature inside a car can get seriously hot, it’s still usually well below the melting point of ABS plastic (221°F/105°C). Phew! However, remember that prolonged exposure to high temperatures can still cause your Legos to soften or warp.
  • Color Variations: As we mentioned earlier, some Lego colors may be more heat-resistant than others. So, depending on the colors of your Legos, they might fare better or worse in a hot car. Fingers crossed for those heat-resistant hues!
  • Heat Tolerance Threshold: It’s important to note that even if the temperature inside a car doesn’t reach the melting point of Legos, they can still suffer damage at lower temperatures. It’s better to be safe than sorry, so keep your Legos out of the heat whenever possible!

Tips to Prevent Legos from Melting in a Hot Car

So, what can you do to protect your precious plastic creations from the scorching heat of a parked car? Fear not, Lego fans, for we have compiled a list of handy tips to keep your bricks safe and sound!

Avoid Leaving Legos in a Parked Car

This one’s a no-brainer, folks! The easiest way to prevent your Legos from becoming disfigured or damaged in a hot car is simply to avoid leaving them in there in the first place. Out of sight, out of mind, right?

Keep Your Car Cool

If you must leave your Legos in your car, do everything you can to keep the temperature down:

  • Park in the shade or use a sunshade to block direct sunlight. Sun protection isn’t just for your skin!
  • Crack the windows to promote air circulation. Just a little fresh air can go a long way!
  • Invest in a car with tinted windows or get your windows tinted. Not only will your car look cooler, but it’ll feel cooler too!

Store Legos in Heat-Resistant Containers

Another way to safeguard your Legos from the ravages of heat is to store them in heat-resistant containers. These nifty storage solutions can provide an added layer of protection against high temperatures:

  • Look for containers made from heat-resistant materials like metal or glass. Sorry, plastic, you’re not invited to this party!
  • Opt for insulated containers or bags to keep your Legos cool. Insulation isn’t just for your attic anymore!

Check on Your Legos Regularly

If you have no choice but to leave your Legos in a hot car, make sure to check on them regularly. This will allow you to intervene if you notice any signs of heat damage. Better safe than sorry!


In conclusion, while it’s unlikely that your Legos will turn into a puddle of molten plastic in a hot car, the risk of deforming is still there. So, the best course of action is to be proactive and take steps to protect your beloved bricks from heat-related damage.

After all, there’s no harm in being extra cautious when it comes to safeguarding your precious Lego creations, right? You betcha!

So, my fellow Lego enthusiasts, let’s recap our hot car survival tips for those cherished plastic bricks:

  1. Avoid leaving Legos in a parked car whenever possible. Simple, yet effective!
  2. Keep your car cool by parking in the shade, cracking windows, and investing in tinted windows. Stay frosty, my friends!
  3. Store Legos in heat-resistant containers for added protection. No melted bricks on our watch!
  4. Check on your Legos regularly to ensure they’re not suffering any heat damage. Keep a close eye on those colorful creations!

By following these tips, you can rest easy knowing your Legos will remain intact and ready for your next epic building adventure. And, hey, while we’re on the topic of epic adventures, why not embark on a quest to discover new ways to keep your Legos safe and sound in all kinds of environments?

Challenge accepted!

Now, go forth, my fellow Lego lovers, and build to your heart’s content, secure in the knowledge that your beloved bricks are safe from the clutches of hot car doom.

Happy building, and may the bricks be with you!

Matthew R

Hi, My name is Matt and I am all about toys! When trying to find accurate information online about toys I was finding it difficult so I decided to make this site.

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