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Is Petg Dishwasher Safe?

Is Petg Dishwasher Safe? | 3D Printing Spot

Updated by

William Stone


November 2, 2023

Key Takeaways

  • High temperatures in most dishwashers may cause PETG to warp or become misshapen.
  • Avoid using a heated dry cycle to prevent the warping of PETG items.
  • Use a gentle detergent and place PETG on the top rack to minimize heat exposure.

If you have any 3D printing experience, you know the importance of cleaning PETG. This is why it is so critical to know if PETG is dishwasher-safe or not.

PETG is extremely safe to put in the dishwasher because of the heat-resistant capabilities it can offer. It would cause most materials to melt, but any PETG filaments will withstand the temperature. This is because it is waterproof and has a high melting point well above the heat in a dishwasher.

Understanding 3D printing and the materials used, like PETG, requires industry knowledge and experience. I’ve tested different methods to properly wash PETG to know whether it can be used in the dishwasher too. I can confidently give a testimony on the inquiry, “Is PETG dishwasher safe?”

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Table of Contents

Is PETG Dishwasher Safe?

PETG is a thermoplastic, which means it can be molded into any shape and can be heated and cooled to make it more pliable. PETG is also known as polyethylene terephthalate glycol and it is a popular material for 3D printing.

PETG is dishwasher safe if you follow the manufacturer's instructions on the packaging and cool-wash it with extreme care. The key is to not let it get too hot or exceed the recommended temperature levels.

This plastic is very durable, but it can be damaged if it gets too hot or cold. PETG is dishwasher safe and it means that it can withstand the high temperatures in a dishwasher without breaking down or melting.

The other important thing about PETG is that it is completely dishwasher-safe and non-toxic, making it perfectly safe for the dishwasher too. It will not leach chemicals or cause any fumes to be released at high temperatures either.

Why You Need To Wash PETG

PETG is not as susceptible to degradation from heat when exposed to a high-temperature range for long periods. This means that PETG needs to be washed with warm water and soap to ensure better durability, chemical heat resistance, and safety.

Washing PETG is important because the material can attract dirt and contaminants over time, and washing it will help keep your PETG items looking new. Consider these reasons below to help understand why you should put your PETG in the dishwasher.

Eliminate Odor & Toxicity

Because this is a plastic material, it can sometimes carry toxins, chemicals, or smells that are unpleasant. By washing the PETG, you can eliminate this risk and remove any chemicals and smells.

Extend the Lifespan of Your PETG

Washing PETG will also help extend the lifespan if it is done correctly. The problem is many people do not do it the right way, and instead, they end up shortening the lifespan of their PETG print.

Excellent Chemical Resistance

PETG is known to be extremely chemical resistant too. This only becomes stronger when you wash your PETG in the dishwasher because it cleans the surface and makes it less susceptible to toxins.

How To Wash PETG

To wash PETG, you need to use warm water, soap, and a light sponge or brush. You should start by rinsing the container with warm water before washing it with dish soap, and then rinse it again with warm water.

You can also use a small scrubbing brush or sponge for stubborn stains. When you are done washing the container, you should air dry it so that it does not become brittle from being washed in hot water.

But because it is dishwasher safe too, you can save time by getting it done in your machine at home. But be sure to consider these steps beforehand.

Check The Temperature Setting On Your Dishwasher

PETG melts at a much lower temperature than most plastics. You should also make sure that the dishwasher does not use too much water at too high of a glass-transition temperature so that it does not deform, melt, or ruin your PETG.

If you want to put PETG in your dishwasher, make sure that the glass transition temperature setting is at or below 140 degrees Fahrenheit. PETG will start to melt and deform closer to 500 degrees, so when at these levels, you have nothing to worry about.

Do Not Overdo the Dry Cycle

When it comes to plastic materials like PETG, they can start to dry out and crack if they are kept too long in a dishwasher. It will also affect their ability to keep the liquids inside of them from leaking out, which can ruin your dishes or tableware.

This is because PETG plastics have a low moisture tolerance and will start to lose their elasticity if they are exposed to heat for too long. This can cause them to crack and break apart.

Try to cut the drying cycle short if necessary to ensure this doesn't happen. They can always air dry for the same effect without any risks of deformation or decay.

When In Doubt You Should Hand Wash

A lot of people who are new to PETG don’t know that this material can withstand a higher temperature setting than other plastics. If you put PETG in a dishwasher with the wrong settings, the plastic could deform and melt because of the heat.

When you have any doubt about the washing process, we recommend avoiding the risk for now and opting to hand wash the material. This will ensure nothing goes wrong, and you have full control over your PETG.

What Temperature Will PETG Melt At?

The melting point of PETG is about 500 degrees Fahrenheit. This is high enough for it to survive in extreme dishwasher temperatures without a problem. This makes it an excellent material for use in the dishwasher too.

It's known for being low-cost, durable, and easy to work with. PETG is also resistant to UV light and weathering, which makes it perfect for 3D printing in a variety of different applications because of its versatility.

Because PETG won’t melt until around 500 degrees, the dishwasher is perfectly safe to wash your PETG 3D-printed objects. On average, a dishwasher only reaches about 140-150 degrees, so it won’t present any type of issue at all.

Despite the capacity to withstand higher temperatures, it is worth mentioning that leaving your PETG filaments in the sun for long can cause deformation. However, this is rare because of how durable and heat-resistant it truly is.

Is PETG Waterproof?

PETG is used in the manufacture of items like plastic bottles and containers, among other things. This makes it a commonly used material when discussing 3D printing for waterproof applications.

It is extremely water-resistant and waterproof. It is commonly used to make waterproof prints too. It has been found that PETG can be used as a substitute in many applications where its properties are required.

With PETG, you can print on both sides of the nylon filament and use an extra coat of PVA glue when 3D printing with PLA to make your object as water-resistant as possible. It is a lot more water-resistant, unlike PLA, which means it can be used to create waterproof prints.

The thermal heat resistance properties of PETG are unmatched, too, when comparing this material to other 3D printing substitutes. This makes it very safe for most home dishwashers to use too.

However, this does not mean it is strictly intended to be used in wet applications. It is known to be much more brittle once it gets wet, and the interlayer adhesion layer lines reduce significantly compared to when it is dry.

PETG is not difficult to dry, though. Because of this, it can get wet and still dry to return to a durable state to keep your PETG prints intact too.

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Is Petg Dishwasher Safe?


William Stone

William Stone

William has spent 20 plus years in the custom manufacturing industry as a COO, CEO and Owner of various custom product businesses. His experience has exposed him to all types of manufacturing from die cast, die struck, injection molding, CNC machining, laser etching, engraving and of course 3D printing.

Learn more about William Stone

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