PLA vs PETG vs ABS: Which Filament Should You Actually Use?

PLA, PETG and ABS account for the overwhelming majority of desktop FDM printing, and choosing between them is the first real decision most people make after buying a printer. The usual advice stops at "PLA is easy, PETG is strong, ABS is heat-resistant." That is true as far as it goes, and it is not enough to actually pick one.

This guide compares all three on the properties that decide real projects: heat tolerance, strength (which is three separate things, not one), printing difficulty and hardware requirements. Every print setting quoted here comes from the Filazoo product page for that material.

The Short Answer

If your part...	Use
Sits indoors and is mostly for looks	PLA
Needs to survive being dropped, bent or used daily	PETG
Lives in a hot car, near a motor, or outdoors in summer	ABS or ASA
Needs to be sanded, painted or vapour-smoothed	ABS
Will be exposed to direct sunlight for months	ASA
Is your first ever print	PLA

If that answers your question, the rest of this article explains why. If it does not, keep reading, because the interesting cases are the ones where two materials both look plausible.

Heat Resistance Is the Spec That Actually Decides This

More filament choices are settled by heat than by strength, and it is the property people underestimate most often.

PLA softens at a lower temperature than the other two. This is not an abstract limitation. The inside of a car parked in summer sun regularly exceeds the point where a PLA part will sag under its own weight, which is why phone mounts, sunglasses holders and dashboard clips printed in PLA fail so reliably that it has become a running joke in the hobby.

PETG holds up meaningfully better. It handles warm environments, hot water and the general heat of a room that gets direct sun. It is not an engineering-grade heat material, but for the vast majority of household and workshop parts it clears the bar.

ABS is the one of the three built for heat. Housings near motors, enclosures around electronics, tools that live in a garage: these are ABS territory. Its higher printing temperature is a direct consequence of the same property that makes the finished part survive heat.

A practical way to decide: if the part will ever be somewhere you would not leave a chocolate bar, do not print it in PLA.

PLA: The Default, and Why That Is Correct

PLA prints at a lower temperature than anything else in common use, warps very little, and does not need an enclosure. Filazoo PLA Basic has a shrinkage of 0.3 to 0.5 percent, which is the technical reason large flat PLA prints stay flat when the same shape in ABS would curl off the plate.

Verified print profile (Filazoo PLA Basic):

• Nozzle: 200 to 210°C at 50 to 100 mm/s, or 210 to 240°C at 100 to 200 mm/s
• Bed: 50 to 60°C, no glue needed. On an unheated bed, glue is required.
• Diameter: 1.75 ± 0.02 mm
• Drying, if needed: 45 to 50°C for 4 to 6 hours

Note the two-band temperature spec. PLA needs more heat when you print faster, because the hotend has less time to melt each millimetre of filament. If you have upgraded to a faster printer and your prints have started looking under-extruded, the temperature is more likely to blame than the speed.

Where PLA is the right answer: display models, miniatures, prototypes you will iterate on, calibration prints, anything for a classroom, and any part where dimensional accuracy matters more than toughness. PLA holds fine detail better than PETG or ABS.

Where PLA fails: heat, as covered above. It is also comparatively brittle. A PLA part under sustained load will not stretch and give the way PETG does; it will hold, hold, and then snap.

PETG: The One Most People Should Print More Of

PETG occupies the space between PLA and ABS, and it is the most under-used of the three. It has meaningfully better impact resistance than PLA, low warping, good moisture and chemical resistance, and it does not need an enclosure.

Verified print profile (Filazoo PETG Basic):

• Nozzle: 230 to 250°C
• Bed: 70 to 90°C
• Diameter: 1.75 ± 0.02 mm
• Drying: 60 to 65°C for 6 to 8 hours if you see popping, bubbles, stringing or a rough surface

Two things about PETG catch people out.

The first is stringing. PETG oozes more than PLA at comparable settings, so it generally needs longer retraction and a little more attention to travel moves. This is a tuning problem, not a material defect, and it is a one-time cost.

The second is more surprising: PETG can bond too well to a smooth PEI or glass build plate. Strongly enough to take a chunk of the plate with it. Apply a thin layer of glue stick as a release layer. That sounds backwards, since glue normally helps adhesion, but here it is acting as a barrier.

Where PETG is the right answer: brackets, organisers, enclosures, tools, planters, signage, anything that gets handled daily, and most parts that live outdoors but not in permanent direct sun.

ABS: Strong, Workable, and Demanding

ABS is the oldest of the three in desktop printing and still the answer for a specific set of jobs. It offers good impact and temperature resistance, and it is the only one of the three that can be acetone-smoothed to a glossy, seamless finish.

Verified print profile (Filazoo ABS):

• Nozzle: 250°C
• Bed: 100°C
• Speed: 50 mm/s, 0.20 mm layer height
• Cooling: disabled
• Enclosure: required, and it must be ventilated

Cooling disabled is the setting that surprises people coming from PLA. PLA wants maximum part cooling for clean overhangs. ABS wants the opposite, because rapid cooling is exactly what causes layers to contract at different rates and pull the part off the plate. Warping in ABS is a cooling problem before it is anything else.

The ventilation requirement is not optional. Print ABS in a ventilated enclosure, not an unventilated box in a bedroom.

What you get in exchange is post-processing that the other two cannot match. ABS can be sanded, drilled, glued, painted, machined and acetone-smoothed. For cosplay props, presentation models and anything where the printed surface is a starting point rather than a finished product, that flexibility is the whole reason to choose it.

PETG vs ABS: The Comparison That Matters Most

Most people arrive at this article having already ruled out PLA. The real decision is PETG or ABS, and it comes down to four questions.

	PETG	ABS
Enclosure needed	No	Yes, ventilated
Bed temperature	70 to 90°C	100°C
Warping risk	Low	High without an enclosure
Heat tolerance	Good	Better
Impact resistance	Good, with some flex	Good, stiffer
Post-processing	Sanding is awkward	Sands, paints, acetone-smooths
Moisture sensitivity	Higher	Lower

The honest summary: if you do not have an enclosure, print PETG. It will do most of what you wanted ABS for, with far less setup and a much lower failure rate on large parts.

Choose ABS when you specifically need the heat headroom, or when the part is going to be finished by hand afterwards. Those two reasons cover almost every legitimate case for ABS over PETG on a desktop printer.

"Strong" Is Three Different Properties

Filament comparisons throw around the word strong as if it were one number. It is not, and conflating the three is why people end up disappointed by a material that was working exactly as intended.

Tensile strength is how much pull a part takes before it fails. PLA scores well here, which surprises people. A PLA hook will hold a lot of weight.

Impact resistance is what happens when you drop it. This is where PLA loses badly and PETG and ABS win. PLA absorbs shock by cracking.

Layer adhesion is how well each layer bonds to the one below. Every FDM part is weaker along the layer lines than across them, regardless of material. If a part keeps snapping along a clean horizontal plane, reorienting it on the plate will often help more than switching material.

So a part that needs to hold a static load can be PLA. A part that gets knocked, dropped or flexed should not be.

Moisture: The Failure Everyone Blames on the Printer

All three absorb moisture from the air, and wet filament produces popping sounds during extrusion, a rough or bubbled surface, weak layers and stringing. It is one of the most common causes of a print quality drop that seems to come from nowhere.

PETG is the most moisture-sensitive of the three. Keep it sealed with fresh desiccant between prints. Drying schedules differ:

• PLA: 45 to 50°C for 4 to 6 hours
• PETG: 60 to 65°C for 6 to 8 hours

Store everything sealed and this stops being a problem you have to think about.

What About ASA?

If you got here because you need an outdoor part, ASA deserves a mention, because it is usually the better answer than ABS.

ASA has the toughness and heat resistance of ABS with much better UV and weather resistance, so outdoor parts hold their colour and do not become brittle after a few months of sun. Filazoo ASA prints at 255°C nozzle, 100°C bed, 50 mm/s, 0.20 mm layer height, cooling disabled, in a heated enclosure. Essentially ABS conditions.

ABS in permanent sunlight will yellow and degrade. ASA will not. For garden fixtures, vehicle accessories, signage and weather-exposed brackets, use ASA.

Decision Matrix by Application

Part	Material	Why
Miniature or display model	PLA	Best fine detail, easiest print
Desk organiser, cable clip	PLA or PETG	PETG if it gets handled constantly
Phone stand	PETG	Weight-bearing, gets knocked
Car interior part	ABS or ASA	PLA will sag in summer
Outdoor planter or garden fixture	ASA	UV stability over months
Electronics enclosure near heat	ABS	Heat headroom
Cosplay prop for painting	ABS	Sands and acetone-smooths
Tool or jig	PETG	Impact resistance without an enclosure
Classroom project	PLA	Low temperature, no enclosure, minimal odour
Large flat plate or baseplate	PLA or PETG	Low warping without an enclosure

Frequently Asked Questions

Can I print PETG on a printer that came set up for PLA?
Almost certainly. PETG needs 230 to 250°C at the nozzle and 70 to 90°C at the bed, which most modern printers reach without modification. Check your hotend is rated above 250°C.

Do I need an enclosure for PETG?
No. That is one of its main advantages over ABS.

Why does my PETG string so much?
Retraction settings tuned for PLA are usually too short for PETG. Increase retraction distance gradually and test. Moisture is the other common cause; dry at 60 to 65°C for 6 to 8 hours.

Is ABS stronger than PETG?
Not straightforwardly. ABS is stiffer and handles heat better. PETG has more give under impact. Which is stronger depends on how the part fails.

Which is best for a beginner?
PLA, then PETG once your first prints are coming out clean. ABS is worth adding when you have an enclosure and a specific reason.

Can I mix these in one print?
On a multi-material setup, PLA and PETG do not bond well to each other, which is occasionally useful: PETG makes a good support interface for PLA precisely because it releases cleanly.

Where to Start

If you are buying one material, buy PLA Basic. If you are buying two, add PETG Basic. Those two cover the great majority of what a desktop printer is used for, and every spool ships with a published diameter tolerance of 1.75 ± 0.02 mm and a starting print profile so you are not guessing at settings.

Browse PLA filament, PETG filament, or the full engineering filament range including ABS, ASA and carbon-fibre composites. New to printing? Start with the Beginner & Everyday collection.