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PETG petrol resistant  

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Gavin
(@gavin)
Eminent Member
PETG petrol resistant

Hi,

Can anyone please tell me if PETG will withstand minor contact with with petrol ?

thanks
Gavin

Posted : 13/03/2021 9:17 pm
Clarmrrsn
(@clarmrrsn)
Honorable Member
RE: PETG petrol resistant

Found another thread on a similar subject, not sure if this helps,  there was some info.

https://forum.prusaprinters.org/forum/original-prusa-i3-mk3s-mk3-print-tips-archive/petrol-gasoline-resistant-flex-filament/

Tank you very much!...
Posted : 13/03/2021 9:22 pm
egar
 egar
(@egar)
Estimable Member
RE: PETG petrol resistant

@lize posted a link to this site in another thread - https://www.plasticsintl.com/chemical-resistance-chart

According to this and people responding to that threat, PETG is resistant to petrol.

Posted : 13/03/2021 10:41 pm
Gavin
(@gavin)
Eminent Member
Topic starter answered:
RE: PETG petrol resistant

 quick update, I left a part printed with Prusa PETG submerged in petrol for a week and there was no noticeable change. all measurements were normal, no breakdown occuring in the PETG

Posted : 17/03/2021 9:43 pm
Dan Rogers
(@dan-rogers)
Noble Member
RE: PETG petrol resistant

PET and Gasoline just ignore each other.  Containers printed in PETG should not be used for Gasoline because 3D prints (filament) are notorious leakers - you don't want to leak gasoline in unexpected places.  But a Float made of PETG could be a reasonable application - you can live through a float sinking much better than gasoline leaking into unexpected places.

Posted : 17/03/2021 10:22 pm
Gavin
(@gavin)
Eminent Member
Topic starter answered:
RE: PETG petrol resistant
Posted by: @dan-rogers

PET and Gasoline just ignore each other.  Containers printed in PETG should not be used for Gasoline because 3D prints (filament) are notorious leakers - you don't want to leak gasoline in unexpected places.  But a Float made of PETG could be a reasonable application - you can live through a float sinking much better than gasoline leaking into unexpected places.

thank you for that info, I am not using it for storage purposes, I need a spacer between two parts that will have a minor amount of petrol exposure. To properly test it I submerged the printed part in petrol for a week. This was a severe test compared to the exposure of petrol.

Posted : 18/03/2021 8:06 am
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