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frontpagegabe23111 posted Oct 30, 2025 01:55 PM
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Item 1 of 2
frontpagegabe23111 posted Oct 30, 2025 01:55 PM

4-Pack 1kg SUNLU PETG 1.75mm 3D Printer Filament Spool Bundle (Black)

+ Free S/H

$36

$47

23% off
Amazon
32 Comments 11,127 Views
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Deal Details
SUNLU Industry via Amazon has 4-Pack 1kg SUNLU PETG 1.75mm 3D Printer Filament Spool Bundle (Black) on sale for $39.99 - Extra 10% Off ($4) (automatically applied at checkout) = $35.99. Shipping is free.

Thanks to community member gabe23111 for finding this deal

Note, product will be sold by SUNLU Industry and fulfilled by Amazon.

Subscribe & Save is available as an alternative shipping option.

About the Product
  • Strong Layer Adhesion
  • Smooth Prints/Toughness
  • High Impact Strength Prints
  • Robust Durability
  • Less Stringing/No Blocking

Editor's Notes

Written by Discombobulated | Staff
  • Price Research
    • At the time of research, this bundle is roughly $8.99/spool (23.41% savings); higher quality/minimizing stringing printing
  • About the Deal
    • Compatible in both PLA and ABS 3D printing w/ recommended snozzle temperature of 240-260°C, bed temperature of 60-70°C, printing speed of 50-200mm/s
    • Pricing/discount is available only in the black colorway
    • Product is eligible for refund/replacement within 30-days of purchase
    • Offer valid while additional savings/supplies last
  • Additional Details

Original Post

Written by gabe23111
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
SUNLU Industry via Amazon has 4-Pack 1kg SUNLU PETG 1.75mm 3D Printer Filament Spool Bundle (Black) on sale for $39.99 - Extra 10% Off ($4) (automatically applied at checkout) = $35.99. Shipping is free.

Thanks to community member gabe23111 for finding this deal

Note, product will be sold by SUNLU Industry and fulfilled by Amazon.

Subscribe & Save is available as an alternative shipping option.

About the Product
  • Strong Layer Adhesion
  • Smooth Prints/Toughness
  • High Impact Strength Prints
  • Robust Durability
  • Less Stringing/No Blocking

Editor's Notes

Written by Discombobulated | Staff
  • Price Research
    • At the time of research, this bundle is roughly $8.99/spool (23.41% savings); higher quality/minimizing stringing printing
  • About the Deal
    • Compatible in both PLA and ABS 3D printing w/ recommended snozzle temperature of 240-260°C, bed temperature of 60-70°C, printing speed of 50-200mm/s
    • Pricing/discount is available only in the black colorway
    • Product is eligible for refund/replacement within 30-days of purchase
    • Offer valid while additional savings/supplies last
  • Additional Details

Original Post

Written by gabe23111

Community Voting

Deal Score
+41
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Top Comments

stingy-cheapskate
9 Posts
10 Reputation
PushPlastics, a US-based filament manufacturer, gave a tour of their facility and did a Q&A. It mentioned most "drying" people do at home is actually "annealing" and thereby raising the hardness of the plastic. This will cause it to print better because it'll tolerate the excessively high nozzle temperature better. The real fix is to print a temperature tower and tune the nozzle temperature lower. Water absorption into the plastic actually breaks the molecular bonds so drying doesn't do anything to fix it. You need a reflowing agent mixed into the plastic to fix water absorption. The only exception to this is Nylon, which acts as a literal sponge. They mentioned that running filament through a dryer does make it print better, but not because it removed the moisture. The video states that PLA and PETG have such negligible water absorption properties that you can basically ignore it. Excessive nozzle temperature causing stringing is the main culprit that people attribute to water absorption.

Check it out. I thought it was super insightful. https://youtu.be/A3H1oFVpUMk?t=58
NickB3364
1457 Posts
883 Reputation
1000% agree with this. I love Sunlu PLA Matte, pretty much use it for everything, and I picked up some of their PETG Matte to try. It was a HORRIBLE print. Bubbly, stringy, complete mess. Popped the spools in my filament dryer for the standard 6 hour overnight dry, then gave it another go. Fantastic prints with it after that.

32 Comments

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Oct 30, 2025 09:54 PM
762 Posts
Joined Nov 2020
GannManOct 30, 2025 09:54 PM
762 Posts
Man I bought this 4 pack a few months ago just tried to use it last night, dried it before use on my babu lab h2d. First print came out bent, warped, pieces everywhere. Second print got stuck on the nozzle and made a giant blob on the nozzle. Never had many issues with this printer 500 hours in. I think it's this filament so be careful with it might damage
1
Oct 31, 2025 12:13 AM
3,383 Posts
Joined Sep 2005
tcopeOct 31, 2025 12:13 AM
3,383 Posts
Just for the note, I've printed with tons of Sunlu PETG, even this specific PETG without issue every time.
1
Oct 31, 2025 01:03 AM
328 Posts
Joined Feb 2010
tdcarterOct 31, 2025 01:03 AM
328 Posts
SunLu PETG is pretty good stuff.
Never had an issue with it, unless you let it get some moisture in it.
Keep it dry.
Oct 31, 2025 02:43 PM
193 Posts
Joined Aug 2011
ajyelloOct 31, 2025 02:43 PM
193 Posts
Quote from Simplykind :
Any recommendation on a cheap yet usefull 4 spool dryer? Or would you only need a single or double and just dry occasionally?
I use a multicooker in dehydrate setting at lowest temperature for 4 to 6 hours. No need for a dedicated filament dryer.
1
Pro
Oct 31, 2025 03:10 PM
499 Posts
Joined Feb 2018
Nm4223
Pro
Oct 31, 2025 03:10 PM
499 Posts
Quote from Simplykind :
Any recommendation on a cheap yet usefull 4 spool dryer? Or would you only need a single or double and just dry occasionally?
S4 goes for as low 90 but I have seen PIx4 deals for 100 too, I would wait for pix4
Oct 31, 2025 03:47 PM
377 Posts
Joined Dec 2007
SimplykindOct 31, 2025 03:47 PM
377 Posts
Appreciate all the drying tips! I have a few dehydrators for jerky so will take that route. Again, thanks again everyone!
Oct 31, 2025 04:21 PM
602 Posts
Joined Jun 2010
EureekaOct 31, 2025 04:21 PM
602 Posts
Quote from stingy-cheapskate :
I saw this video from a filament manufacturer recently. It mentioned most "drying" people do at home is actually "annealing" and thereby raising the hardness of the plastic. This will cause it to print better because it'll tolerate the excessively high nozzle temperature better. The real fix is to print a temperature tower and tune the nozzle temperature lower. Water absorption into the plastic actually breaks the molecular bonds so drying doesn't do anything to fix it. You need a reflowing agent mixed into the plastic to fix water absorption. The only exception to this is Nylon, which acts as a literal sponge.

EDIT: The video states that PLA and PETG have such negligible water absorption properties that you can basically ignore it. Excessive nozzle temperature causing stringing is the main culprit that people attribute to water absorption.

Check it out. I thought it was super insightful. https://youtu.be/A3H1oFVpUMk
You should always calibrate a new brand/type of filament, and built your own profile for your machine. Sometimes, even going so far as to calibrate for color (white and black have different material shrinkage values for me). And as for this Sunlu; it does print better if it's been warmed up.

PLA anneals at 60c; so sure, most of the dryers on the market reach 70c so they're annealing PLA
PETG anneals at 110c though; and unless you specifically purchased a high temp dryer the most you're doing is warming it up and drying the additives/pigments. Either way, Sunlu PETG seems to come wet, and always prints better after a trip in a dryer.

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Oct 31, 2025 09:17 PM
115 Posts
Joined Nov 2005
thoominOct 31, 2025 09:17 PM
115 Posts

Our community has rated this post as helpful. If you agree, why not thank thoomin

To answer everyone's question about this filament, Sunlu literally has information on the site saying that you should dry it at 65c for 8+ hours before using. They also recommend drying throughout while printing it on a long print of 6hrs+.

1
Nov 01, 2025 09:43 PM
44 Posts
Joined Jun 2020
FabulousSparrow5215Nov 01, 2025 09:43 PM
44 Posts
Quote from Simplykind :
Any recommendation on a cheap yet usefull 4 spool dryer? Or would you only need a single or double and just dry occasionally?
Depends on the filament you want to use it for. If you want ABS and Nyon etc...you will need one that specifically heats up enough which I think leaves Creality. If you just want for PLA probably not necessary (depends where you live) but any of them will pretty much work. PETG about the same.
Nov 01, 2025 09:46 PM
44 Posts
Joined Jun 2020
FabulousSparrow5215Nov 01, 2025 09:46 PM
44 Posts
Quote from stingy-cheapskate :
Not exactly. The video states that PLA and PETG have such negligible water absorption properties that you can basically ignore it. Excessive nozzle temperature causing stringing is the main culprit that people attribute to water absorption.
I would agree with this... Overall this is true.
Nov 01, 2025 09:46 PM
44 Posts
Joined Jun 2020
FabulousSparrow5215Nov 01, 2025 09:46 PM
44 Posts
Quote from ws2112 :
My experience has not been good with sunlu petg. All 4 spools that got from Amazon exhibit stringing, and constant clogging even after 8hrs of drying in the my Anycubic AMS. Whereas, the kingroon spools that I had in the same AMS (2 sunlu & 2 kingroon), worked fine after drying. I also have sunlu matte pla, silk, their sister brand jayo matte and pla+, none of them has clogging issues. But for the sunlu petg spools, they just clog constantly.
Kingroon is Sunlu rebranded.
Nov 03, 2025 01:44 PM
60 Posts
Joined Nov 2011
chezdudeNov 03, 2025 01:44 PM
60 Posts
Quote from FabulousSparrow5215 :
Kingroon is Sunlu rebranded.
Not doubting you, but can you post a source? The filament market is so whacked with all the weird brands and I believe that there are really only a few main manufacturers (like monitor panels) with everyone just rebadging the same stuff.
Nov 03, 2025 10:25 PM
7,949 Posts
Joined Mar 2005
flangomangoNov 03, 2025 10:25 PM
7,949 Posts
Quote from stingy-cheapskate :
I saw this video from a filament manufacturer recently. It mentioned most "drying" people do at home is actually "annealing" and thereby raising the hardness of the plastic. This will cause it to print better because it'll tolerate the excessively high nozzle temperature better. The real fix is to print a temperature tower and tune the nozzle temperature lower. Water absorption into the plastic actually breaks the molecular bonds so drying doesn't do anything to fix it. You need a reflowing agent mixed into the plastic to fix water absorption. The only exception to this is Nylon, which acts as a literal sponge.

EDIT: The video states that PLA and PETG have such negligible water absorption properties that you can basically ignore it. Excessive nozzle temperature causing stringing is the main culprit that people attribute to water absorption.

Check it out. I thought it was super insightful. https://youtu.be/A3H1oFVpUMk
We're all going to believe some random YT'er over the people who actually manufacture this stuff?
That video has like 5K views 🤣😂 Doesn't exactly pass "peer review"
3
Nov 03, 2025 10:37 PM
9 Posts
Joined Nov 2024
stingy-cheapskateNov 03, 2025 10:37 PM
9 Posts
Quote from flangomango :
We're all going to believe some random YT'er over the people who actually manufacture this stuff?
That video has like 5K views 🤣😂 Doesn't exactly pass "peer review"
Scrub forward to the 1:00 mark. That's when the interview with the filament manufacturer begins.

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Nov 05, 2025 06:38 AM
587 Posts
Joined Jul 2008
EcoCheapNov 05, 2025 06:38 AM
587 Posts
Got mine and tried it out. Fresh out of the package, my print was super stringy. Trying 10 degrees below the recommended lower limit did not help.

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