SUNLU PETG is the cheapest PETG we would put in a printer. It needs more tuning than the premium spools and rewards it — after one evening on retraction settings, it stops being something you think about.
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The picks, ranked
The picks, ranked
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Product
Best for
Score
Price
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SUNLU PETGCheap enough to print PETG habitually rather than saving it for parts that need it.Budget PETG, vacuum sealed
Live prices verified September 1, 2026. Scores are our own fit rating for the stated use, not a measurement and not a customer rating.
A partly used spool of translucent filament.
The case for cheap PETG
There is a behavioral argument for budget PETG that has nothing to do with the polymer: at a low enough price, you stop rationing it. People who buy expensive PETG print PLA for everything and save the PETG for parts they have decided need it — which means they print PLA parts that should have been PETG and then reprint them.
SUNLU PETG is cheap enough to be the default rather than the special occasion. For anything that gets handled, that is a better outcome than a marginally cleaner surface on a spool you use twice a year.
What the evening of tuning involves
In order, and the order is the point:
Dry it. Even a sealed spool, if it has been in stock a while. Prusa publish 55 C for six hours Prusa Research.
Temperature tower across 230 to 260 C, inside the published 215 to 270 C class range Prusa Research.
Flow calibration. Budget filament varies more in diameter, and PETG shows over-extrusion as a rough top surface.
Retraction tuning last, once the first three are settled.
That sequence is on the PETG settings page in full. It is an evening once, not an evening per spool.
Its limits
Batch-to-batch variation is wider than the premium spools. Colors are not perfectly consistent between orders. There is no published technical data sheet. None of those matter for a bracket; all of them matter if you are printing a matched set or designing to a dimension.
The other honest caveat is packaging. SUNLU seal their spools, and the seal is adequate, but PETG punishes a marginal seal more than PLA does. Treat a new spool as suspect and check it on the first print rather than assuming.
Every pick, in detail
01
SUNLU PETG
SUNLU
Buying PETG in quantity · 8.1/10 our fit score
Illustrative photo of the product type, not this exact item.
The cheapest PETG worth loading. Expect to spend an evening on retraction tuning and then forget about it.
Yes, if you are willing to tune it once. The polymer is fine; the savings come out of consistency and documentation, both of which you can substitute with an evening of calibration. Our cheap filament analysis covers the failure-rate side of the arithmetic.
+ − Why does SUNLU PETG string more than my PLA?
Because it is PETG. All PETG strings more than PLA — it absorbs more water and stays viscous across a wider temperature band. Dry it, then set temperature, then tune retraction, in that order.
