Is PETG as strong as ABS?

For most parts, near enough, and it is far easier to print. ABS wins on heat, holding shape to roughly 100C against PETG's 80C. Below that, PETG usually does the job without an enclosure or fumes.

Do I need an enclosure for PETG?

No. PETG shrinks little enough to print on an open frame, which is the single biggest practical difference between the two. ABS needs still, warm air or it lifts.

Can PETG be acetone smoothed?

No. Acetone does nothing useful to PETG, and sanding dulls it rather than polishing it. If a smooth finish matters, ABS gives you a finishing route PETG does not have.

Which is better for functional parts?

PETG for most, ABS when heat is involved. PETG's flexibility means a bracket bends instead of snapping, and it needs no special hardware to print reliably.

Does ABS or PETG smell more?

ABS, clearly. It releases styrene and needs ventilation. PETG's emissions are minimal by comparison, which matters if the printer shares a room with you.

Home/ABS vs PETG

ABS vs PETG: which wins?

ABS used to be the go-to for strong parts. PETG changed that. For most functional prints, PETG is easier, safer, and stronger where it counts. This page shows you the four situations where ABS still wins, and when PETG is the smarter call.

SIDE BY SIDE

See the key differences before you load the spool.

Nozzle temp220-250°C220-250°C

Bed temp100-110°C70-85°C

EnclosureRequiredNot needed

Needs dryingYesYes

DifficultyIntermediateBeginner

Typical price, 1 kg$18-30$18-30

Heat resistance~100°C deformation~80°C deformation

Chemical resistanceGoodModerate

FumesYes (styrene)Minimal

Warping riskHigh without enclosureLow

Post-processingSandable, acetone-smoothableLimited (sanding dulls surface)

ABS WINS

The 4 situations where ABS is the right call.

Parts that need to survive above 80°C

PETG deforms around 80°C. ABS holds to ~100°C. If your part lives near a heat source, engine bay, oven-adjacent, under-hood, ABS has the edge.

Acetone vapor smoothing

Acetone dissolves ABS surface to create a near-injection-mold finish. No layer lines visible. PETG does not respond to acetone. If surface finish matters, ABS gives you a finishing option that PETG simply does not have.

Solvent bonding

ABS parts can be bonded with acetone or MEK to create joints stronger than adhesive bonding. This is useful for multi-piece assemblies where super glue will not hold the load.

Chemical resistance

ABS resists many oils and organic solvents better than PETG. For parts that contact lubricants, fuels, or cleaning chemicals, ABS holds up better.

PETG WINS

Use PETG and skip the enclosure, fumes, and warping.

AdvantageWhy it matters

No enclosure required

PETG does not warp without an enclosed chamber. ABS almost certainly will warp without one, especially on large flat prints. If your printer is open-frame, PETG is the obvious choice.

No styrene fumes

ABS emits styrene, a suspected carcinogen. Always print ABS with ventilation or a filtration enclosure. PETG is much safer. No harsh fumes, fine to print in an office or home workspace.

Better layer adhesion

PETG bonds between layers better than ABS. For most mechanical loading scenarios, a PETG print is actually stronger than ABS despite the lower heat resistance.

More forgiving to print

PETG has a wider process window. ABS requires tight temp control, a warm enclosure, and a hot bed. PETG tolerates more variation and fails less often.

OUTDOOR · USE ASA INSTEAD

Outdoor part? Skip ABS. Use ASA.

If you are considering ABS because you need UV resistance outdoors, do not. Use ASA. ASA is ABS modified specifically for UV resistance. It does not yellow in sunlight, handles the same heat range as ABS (~100°C), and is actually easier to print than ABS on most setups. ASA has almost entirely replaced ABS for outdoor applications. The only reason to pick ABS over ASA outdoors is if you specifically need acetone vapor smoothing.

VERDICT

The one-sentence verdict.

Use PETG for 90% of functional parts. It is easier to print, safer to breathe, does not need an enclosure, and bonds layers better than ABS.

Switch to ABS only if you specifically need heat tolerance above 80°C, acetone smoothing, acetone solvent bonding, or chemical resistance that PETG cannot provide.

PLA vs PETG PLA vs ABS All 31 materials Dry your filament

FREE SETTINGS SHEET

Both materials, one reference sheet.

ABS needs enclosure temperatures. PETG needs retraction dialled in per brand. Our printable settings guide covers both, alongside every other material we document. A logging app is in development and we will say so here when it ships.

Get the free field guide

Common questions

Is PETG as strong as ABS?: For most parts, near enough, and it is far easier to print. ABS wins on heat, holding shape to roughly 100C against PETG's 80C. Below that, PETG usually does the job without an enclosure or fumes.
Do I need an enclosure for PETG?: No. PETG shrinks little enough to print on an open frame, which is the single biggest practical difference between the two. ABS needs still, warm air or it lifts.
Can PETG be acetone smoothed?: No. Acetone does nothing useful to PETG, and sanding dulls it rather than polishing it. If a smooth finish matters, ABS gives you a finishing route PETG does not have.
Which is better for functional parts?: PETG for most, ABS when heat is involved. PETG's flexibility means a bracket bends instead of snapping, and it needs no special hardware to print reliably.
Does ABS or PETG smell more?: ABS, clearly. It releases styrene and needs ventilation. PETG's emissions are minimal by comparison, which matters if the printer shares a room with you.

So which should you buy?

Choose ABS if

220-250°C nozzle · 100-110°C bed · enclosure required

Automotive interior parts
Enclosures
Parts that will be sanded or smoothed

The catch: Corners lift off the bed and layers split partway up. The cause is nearly always a draught, not the bed temperature. Enclose the printer and turn the part cooling fan off.

Typical price $18-30 per 1 kg spool. Needs drying before use.

Full ABS settings ABS on Amazon

Choose PETG if

220-250°C nozzle · 70-85°C bed · no enclosure

Functional parts
Outdoor fixtures
Food-adjacent containers

The catch: Stringing between towers. Drop the nozzle 5C at a time and raise travel speed before you touch retraction distance.

Typical price $18-30 per 1 kg spool. Needs drying before use.

Full PETG settings PETG on Amazon

Before you order either

ABS needs an enclosure. Without one it will warp, and no spool or setting fixes that.
Buy vacuum-sealed with desiccant, and read how to dry filament before the first failed print rather than after it.
Check the published diameter tolerance. ±0.02mm is good; ±0.05mm shows up as inconsistent extrusion whatever you paid.

Not printing it yourself?

If you would rather have the part arrive than pick a filament, upload the model and get a price in both materials.

FDM only, up to 220mm per side, shipping within the United States. Accepts STL, 3MF, STEP, OBJ.

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Ownership: 3DPrinterOnDemand is Another Anvil Road property, so we have a commercial interest in it. We are not recommending it as an independent party, and where it cannot print a material we say so and point elsewhere.