<p>This is highly relevant: PETG is very resistant to Ozone.</p>
<p><a href="https://www.plasticsintl.com/chemical-resistance-chart" rel="nofollow noreferrer">https://www.plasticsintl.com/chemical-resistance-chart</a></p>

CC BY-SA 4.0
2021-09-13T02:01:07.243Z
Link only answer. Please [edit] and add the chart to your answer. If the link dies your question won't be of much use to others.
Greenonline
CC BY-SA 4.0
2021-03-10T12:58:49.373Z
2021-09-13T02:00:02.467Z
2021-09-13T02:00:02.467Z
Alexandreads
<p>According to <a href="https://www.calpaclab.com/polyetherether-ketone-peek-chemical-compatibility-chart/" rel="nofollow noreferrer">https://www.calpaclab.com/polyetherether-ketone-peek-chemical-compatibility-chart/</a> and <a href="https://www.polyfluor.nl/en/chemical-resistance/peek/" rel="nofollow noreferrer">https://www.polyfluor.nl/en/chemical-resistance/peek/</a> PEEK is very resistant to ozone.</p>

<p>PEEK does cost about as much per gram as silver.</p>

CC BY-SA 4.0
2020-04-22T02:46:08.217Z
PEEK also requires a printer capable of temperatures over 370°C, which tend to be quite expensive or extensive mods to an inexpensive printer.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2020-04-23T12:29:50.393Z
Does that make anything in my post inaccurate?
Davo
CC BY-SA 4.0
2020-04-23T15:18:56.647Z
No, just likely less useful to OP and other readers.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2020-04-21T23:02:56.323Z
2020-04-21T23:02:56.323Z
Davo
<p>If making your own caps ends up being the best solution, TPU (thermoplastic polyurethane) is probably your best bet. I don't have specific information on printed TPU filament and ozone, but TPU is widely regarded as one of the most chemical-resistant materials you can easily print with, and <a href="https://ozonesolutions.com/blog/ozone-compatible-materials/" rel="nofollow noreferrer">this page by Ozone Solutions</a> rates polyurethane (no mention of specific types) A/Excellent described as:</p>
<blockquote>
<p>Ozone has <strong>no effect</strong> on these materials. They will last indefinitely.</p>
</blockquote>
<p>Being at least slightly flexible, TPU will also yield a good seal without any additional gasket. You should probably choose an unpigmented &quot;natural/clear&quot; TPU filament in case the pigments do react.</p>
<p>It might (probably would) also work to coat an existing cap with polyurethane. I'm not sure how you'd best get it to adhere, but lightly sanding the plastic then using a spray in multiple coats is what I'd try first.</p>

CC BY-SA 4.0
2020-04-20T17:55:17.743Z
2021-09-12T15:21:32.590Z
2021-09-12T15:21:32.590Z
R.. GitHub STOP HELPING ICE
<p>Does a filament exist that can resist ozone (like certain silicone tubing's can). Most glass bottles come with tin or plastic screw hard tops and I would like to replace the screw caps with something that is more resistant to ozone.</p>

<p>The reason for this is I make my own homemade ozonated oil in glass bottles and I would like to print out different hard screw top caps for some of the bottles.</p>

CC BY-SA 4.0
2020-04-20T05:14:25.767Z
What about a coating? Either for your original tops or your 3d printed replacements.
R.. GitHub STOP HELPING ICE
CC BY-SA 4.0
2020-04-20T07:26:37.023Z
@R..GitHubSTOPHELPINGICE It could work.  The original screw cap has completely fallen apart and rusted.  But if I print another screw cap with PLA / PETG and coat that part it could also work (as long as the screw cap can be closed)
Rick T
CC BY-SA 4.0
2020-04-20T09:37:46.747Z
You can also use a protective foil between the screw cap and the bottle. Just be sure it doesn't get torn when you screw/unscrew, but since it could be made of plastic, it shouldn't happen.
FarO
CC BY-SA 4.0
2021-03-10T18:46:38.617Z
If plastic caps don't work out for you, you can get glass reagent bottles with glass stoppers.
Andrew Morton
CC BY-SA 4.0
2021-03-11T09:56:38.623Z
You cannot 3D print it but you can make a gasket out of cork. It will hold well. And you can use any cap for that, just cut a round disk out of 2-3 mm cork. https://websealinc.com/technical-info/additional-materials/cork-gaskets/ Do not use PLA-cork filament, PLA does not resist to ozone. Or just use a normal cork from wine bottles...
FarO
<filament><fdm><filament-choice>
Filament that is resistant to ozone
Rick T
# Filament that is resistant to ozone

(Asked by: username_0 on 2020-04-20)

Does a filament exist that can resist ozone (like certain silicone tubing's can). Most glass bottles come with tin or plastic screw hard tops and I would like to replace the screw caps with something that is more resistant to ozone.

The reason for this is I make my own homemade ozonated oil in glass bottles and I would like to print out different hard screw top caps for some of the bottles.

**Tags:** filament, fdm, filament-choice
> **Comments:**
> **username_1**: What about a coating? Either for your original tops or your 3d printed replacements.  
> **username_0**: @R..GitHubSTOPHELPINGICE It could work.  The original screw cap has completely fallen apart and rusted.  But if I print another screw cap with PLA / PETG and coat that part it could also work (as long as the screw cap can be closed)  
> **username_2**: You can also use a protective foil between the screw cap and the bottle. Just be sure it doesn't get torn when you screw/unscrew, but since it could be made of plastic, it shouldn't happen.  
> **username_3**: If plastic caps don't work out for you, you can get glass reagent bottles with glass stoppers.  
> **username_2**: You cannot 3D print it but you can make a gasket out of cork. It will hold well. And you can use any cap for that, just cut a round disk out of 2-3 mm cork. https://websealinc.com/technical-info/additional-materials/cork-gaskets/ Do not use PLA-cork filament, PLA does not resist to ozone. Or just use a normal cork from wine bottles...  

---

## 3 answers

### Answer by username_1 on 2020-04-20. Score: 4 | Accepted answer

If making your own caps ends up being the best solution, TPU (thermoplastic polyurethane) is probably your best bet. I don't have specific information on printed TPU filament and ozone, but TPU is widely regarded as one of the most chemical-resistant materials you can easily print with, and [this page by Ozone Solutions](https://ozonesolutions.com/blog/ozone-compatible-materials/) rates polyurethane (no mention of specific types) A/Excellent described as:

> Ozone has **no effect** on these materials. They will last indefinitely.

Being at least slightly flexible, TPU will also yield a good seal without any additional gasket. You should probably choose an unpigmented "natural/clear" TPU filament in case the pigments do react.

It might (probably would) also work to coat an existing cap with polyurethane. I'm not sure how you'd best get it to adhere, but lightly sanding the plastic then using a spray in multiple coats is what I'd try first.


---

### Answer by username_4 on 2021-03-10. Score: 2

This is highly relevant: PETG is very resistant to Ozone.

<https://www.plasticsintl.com/chemical-resistance-chart>

> **Comments:**
> **username_5**: Link only answer. Please [edit] and add the chart to your answer. If the link dies your question won't be of much use to others.  

---

### Answer by username_6 on 2020-04-21. Score: 0

According to <https://www.calpaclab.com/polyetherether-ketone-peek-chemical-compatibility-chart/> and <https://www.polyfluor.nl/en/chemical-resistance/peek/> PEEK is very resistant to ozone.

PEEK does cost about as much per gram as silver.

> **Comments:**
> **username_1**: PEEK also requires a printer capable of temperatures over 370°C, which tend to be quite expensive or extensive mods to an inexpensive printer.  
> **username_6**: Does that make anything in my post inaccurate?  
> **username_1**: No, just likely less useful to OP and other readers.  

---

