Best 3D Printer Filament Australia 2026:
PLA, PETG, TPU

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Most bad prints start with the filament

When a printer starts stringing, popping or leaving rough, weak layers, the first thing most people blame is the nozzle, the slicer or the printer itself. More often than not, I reckon, it's the filament, and usually it's filament that's soaked up water from the air while it sat on the spool holder for a month. Coastal air does that faster than most people expect. A $26 spool can ruin a 20-hour print just as easily as a $60 one, and no amount of slicer tuning fixes plastic that's wet.

So this guide treats filament and a dryer as one setup rather than separate purchases. I've picked five things from Amazon AU between $22 and $69 at time of writing: a PLA+, a PETG, a 4kg PLA+ refill bundle for anyone printing a lot, a TPU for flexible parts, and a filament dryer. All five are sold through the brand's own Australian storefront (eSUN, OVERTURE and Creality), and the PLA+ is #1 in Amazon AU's Printers and Accessories category.

It's a companion to our value 3D printer guide, which covers the machines themselves. If you haven't bought a printer yet, start there, because the printer you choose decides which of these materials are easy and which are a fight. The two guides link to each other, so you can go back and forth while you price up a printer and the first few kilos of material it'll need.

PLA, PLA+, PETG or TPU: pick by the job

PLA is the default for good reason. It prints at modest temperatures, barely warps, doesn't need an enclosure and gives clean detail, so it's the right choice for models, brackets that live indoors, cases for electronics that won't get hot, and most first prints. Its weak spot is heat. PLA starts going soft not far above 50°C, so a phone mount on a dashboard or a part near a motor or a warm power supply will sag over a summer.

PLA+ is PLA with additives that make it a bit tougher and less brittle. There's no single standard for what the plus means, so it varies by brand, but it's usually the better buy for anything functional, like clips, hooks and cable guides, that will get flexed or dropped. eSUN's listing describes its PLA+ as having higher strength and toughness than ordinary PLA, and that matches what most people find.

PETG is the step up for parts that live outdoors, get wet or take some heat and knocks. It's tougher and more flexible than PLA and it doesn't soften as early. It also strings more, sticks to some build plates too well, and soaks up water faster than PLA, so it really does need drying. If you want a part to sit in full sun for years, ASA is what people usually reach for, but I didn't find an ASA from an Australian seller worth recommending in this band, so it isn't one of the picks.

TPU is the flexible one, for bumpers, gaskets, feet, cases and anything that needs to bend and come back. 95A is the common hardness, firm like a shoe sole rather than rubbery. It prints slowly, it hates long feed paths, and it absorbs moisture readily, so treat a dryer as part of the kit if you plan to print much of it.

Why coastal air is hard on filament

PLA, PETG and especially TPU are all hygroscopic, which means they pull moisture out of the air. On the Central Coast, where a damp week can hold the humidity high day and night, an open spool can pick up enough water in a few days to change how it prints. Air-conditioned rooms help, but most printers live in garages, spare rooms and sheds, which is where the air is wettest.

Wet filament gives itself away. You'll hear small pops or a hiss at the nozzle as the water boils off, see fine stringing and a fuzzy or bubbly surface, and find layers that peel apart more easily than they should. PLA that's been wet for a long time also tends to snap in the feed tube, which on a multi-spool feeder means a jam halfway through a print. If any of that sounds familiar and you've already swapped nozzles, dry the spool before you change anything else.

It isn't only the plastic. Moisture in a closed-up shed or garage also corrodes the printer's own electronics, the stepper motor connectors and the mainboard, which is a slower version of what we see in phones and laptops. A room dehumidifier helps both the filament and the printer if the space is shut most of the time.

Drying and storing it properly

A filament dryer is a small heated box with a fan that holds a spool at a set temperature for a few hours to drive the water out. The Creality Space Pi SE in the picks runs from 45 to 65°C with a 0 to 24 hour timer, shows the humidity inside, and lets you print straight out of it through a feed hole. PLA is usually dried at the low end of that range and PETG and TPU higher, and OVERTURE's own TPU listing suggests more than eight hours at 65°C. Go by the filament maker's figure, because PLA in particular will deform if you overheat it.

A kitchen oven isn't a substitute. Ovens overshoot their set temperature badly at the low end of the dial, and a spool that's been softened against the rack is scrap. A food dehydrator can work if the spool fits and the thermostat is honest, but a purpose-built dryer is easier to get right and you can leave it feeding the printer.

Drying is only half the job. Once a spool is dry, keep it dry between prints in a sealed tub or bag with fresh silica gel. Creality's listing makes the same suggestion and recommends a vacuum bag after drying. If you already own one of the vacuum sealers we recommend for the kitchen, its bags work on filament too, as long as you add a desiccant sachet and don't let the bag crush the spool edge.

Rechargeable silica gel with a colour indicator is worth having, because desiccant that's full stops working without telling you. A small humidity card in the tub does the same job and tells you when it's time to dry the sachets out.

How long a dried spool stays dry depends on where it lives. In a sealed tub with fresh desiccant, weeks. On an open holder in a damp garage, I'd expect PETG and TPU to need drying again within days, and PLA within a couple of weeks. If you print from a multi-spool feeder, check its own desiccant compartment too, because those trays fill up and stop working long before most people think to look.

Cost per kilo: single spools against bundles

Filament is priced per spool, but the number that matters is cost per kilo of usable plastic. At time of writing the eSUN PLA+ is $25.64 for 1kg and the OVERTURE 4kg PLA+ refill is $65.59, which works out to about $16.40 a kilo, roughly a third less per kilo for the bundle. If you print every week, that adds up quickly. If you print once a month, a 4kg bundle will sit around soaking up water for most of a year, and that's a poor trade.

Buy bundles in the colour you actually go through. Most people end up printing the bulk of their functional parts in one or two plain colours, and a 4kg pack of the colour you use for brackets and clips makes more sense than four colours you'll use once each. The bundle in the picks is four black refills, which suits exactly that.

Running cost includes waste. Failed prints, purge on multi-colour machines and the supports you snap off all come out of the same kilo. Drying cuts the failures, and sorting out your supports and settings cuts the rest. Electricity for the printer and dryer counts too, but the dryer's listing doesn't state its wattage, so I can't give a figure for it. For the printer, check its rated power and use the tariff on your bill. Our guide to measuring what appliances really cost to run shows how to do it properly with a metering smart plug.

Don't stockpile more than you'll print in a few months either. Unopened vacuum-sealed spools keep well, and OVERTURE quotes a one-year shelf life for unopened spools on its PETG listing, but once a bag is opened the clock starts, and a cupboard full of open spools is a cupboard full of filament that'll need drying.

Third-party filament in a Bambu AMS

A lot of people reading this will have a Bambu Lab printer with an AMS, so it's worth getting right. Bambu's own filament carries an RFID tag that the AMS reads, which fills in the material type and colour for you. Third-party spools don't have the tag, so you set the material and colour by hand for each slot. It's a minute's work, and once it's set the AMS feeds third-party filament the same way. At time of writing I couldn't find Bambu-brand filament on Amazon AU at all, so for Amazon buyers it's third-party or nothing.

Spool fit is the other issue. Cardboard spools are common on third-party filament and they're a known nuisance in an AMS: the edges can shed fibres and dust into the feed rollers, and a slightly out-of-round cardboard spool can slip instead of turning. Some people print adapter rings or tape the edges, but the cleaner fix is refill filament on a reusable spool. The OVERTURE refill in the picks is spoolless, and its listing says it fits the Bambu AMS reusable spool and other master spools, so you buy a master spool once and snap refills onto it.

TPU is the exception. Most multi-spool feeders don't like flexible filament because it buckles in long tube runs. Feed TPU from an external spool holder on a direct drive printer, and check your printer maker's advice before loading it into any automatic feeder. Creality's TPU listing itself recommends a direct drive extruder.

Tolerance, winding and the listing numbers worth reading

Diameter tolerance is the spec that matters most on a listing. Filament is meant to be 1.75mm, and a tolerance of plus or minus 0.03 to 0.05mm is normal for a decent brand. Wider variation means the extruder pushes more plastic on some layers than others, which shows up as banding and uneven walls. Two of the listings here quote different tolerance figures in the title and the bullet points, which tells you something about how carefully the copy was written, if not about the filament.

Winding matters more on long prints. A spool wound with crossed-over loops can tangle and pull tight halfway through a 15-hour print, and the printer will happily keep printing air. Every brand in the picks claims tidy or tangle-free winding. That's hard to prove from a listing, so the practical habit is to never let the loose end go when you take a spool off the printer, and clip it into the side hole every time.

I'd ignore speed claims you can't use. A figure like 300mm/s is a printer limit as much as a filament one, and older bed-slingers won't get near it. Vacuum-sealed packaging with a desiccant is the claim I'd actually look for, because it means the spool should arrive dry. Even then, I'd run a fresh spool of PETG or TPU through the dryer before any long print.

Colour can matter more than people think, too. Glitter and glow-in-the-dark filaments carry particles that wear a standard brass nozzle much faster than plain colours, and they can print a little differently from the same material in black or white. Stick to plain colours for functional parts and save the novelty finishes for display pieces, or fit a hardened nozzle first.

The 5 picks, $22 to $69

Prices are Amazon AU at time of writing (5 October 2026) and move week to week. Ranks are Amazon AU category sales ranks, checked the same day.

Side-by-side comparison

What we see fail at the bench: filament and feed faults

Most of what goes wrong with a home 3D printer starts in the filament path rather than the electronics, and it tends to look like a hardware fault when it isn't. These are the three I'd rule out before blaming the printer, buying a new hotend or pulling the board. Each one is quick to check with the printer cold and a torch.

Decision tree: which one should you actually buy?

• New to printing and want one spool that just works? → Start with the eSUN PLA+ at $25.64. It's the #1 ranked filament here and forgiving on default settings.
• Printing parts for outside or the car? → Use the eSUN PETG at $22.39, and dry it before long prints.
• Print a lot of black parts and own a reusable spool? → The OVERTURE 4kg PLA+ refill at $65.59 works out to about $16.40 a kilo, with no spools to throw away.
• Need something flexible? → The Creality TPU 95A at $35.99, printed on a direct drive extruder from an external spool holder.
• Prints stringing, popping or snapping in the tube? → Dry the spool before you change anything else. The Creality Space Pi SE at $68.79 dries one spool and lets you print straight from it.
• Printer resetting, cutting out or not powering on at all? → That's electrical, not filament. Bring it into our Erina workshop and I'll check the power supply and wiring and tell you whether it's worth fixing before you spend anything.

Frequently asked questions

What's the difference between PLA and PLA+?

PLA+ is PLA with additives that make it tougher and less brittle, so functional parts like clips and brackets are less likely to snap. There's no industry standard for what the plus means, so the exact blend varies from brand to brand. It prints at much the same settings as ordinary PLA and is just as easy to use. It still softens with heat like normal PLA, so neither is a good choice for parts left in a hot car or near anything that runs warm. For a first spool, I'd usually pick PLA+ over plain PLA.

Do I really need a filament dryer?

If you print PETG or TPU, or keep your printer in a garage, shed or spare room near the coast, yes. Those materials pull moisture out of the air quickly, and wet filament causes stringing, popping, rough surfaces and weak layers that look like a printer fault. If you only print PLA in an air-conditioned room and use spools within a few weeks, you can get by with a sealed tub and silica gel. A dryer you can print straight out of is the simplest fix, and it costs less than a couple of failed long prints in wasted plastic and time.

Can I use third-party filament in a Bambu Lab AMS?

Yes. Third-party filament feeds through an AMS the same way, but it doesn't have the RFID tag that Bambu's own spools carry, so you set the material type and colour by hand for each slot. Cardboard spools are the main nuisance, because they can shed fibres into the feed rollers or slip instead of turning. Plastic spools, or spoolless refills on a reusable master spool, avoid that. Keep flexible TPU out of the AMS and feed it from an external spool holder instead. At time of writing I couldn't find Bambu-brand filament on Amazon AU.

Is PETG or PLA better for outdoor parts?

PETG, for most outdoor jobs. It's tougher, handles water better and doesn't soften as early as PLA, which can sag in summer sun or inside a hot car. PETG isn't perfect outdoors either, because long-term sun exposure still degrades it over time. For parts that will sit in full sun for years, ASA is the material most people use, though it usually needs an enclosed printer. For garden fittings, hose brackets and anything that gets wet but isn't baking all day, PETG is the sensible middle ground and it prints on almost any machine.

How should I store 3D printer filament?

Keep it sealed with desiccant whenever it isn't on the printer. A clear tub with a good lid and a few sachets of rechargeable silica gel works, or a vacuum bag with a desiccant sachet inside. Dry a spool before storing it if it's been open for a while, and recharge the silica gel when the indicator changes colour. Always clip the loose end into the spool edge before it goes away, because a loose end is how most tangles start. On the coast, a spool left open on a holder for weeks will need drying before its next long print.

How do I know if my filament is wet?

Listen and look at the first layers. Wet filament often makes small popping or hissing sounds at the nozzle as the water boils off, and you'll see fine stringing, a fuzzy or bubbly surface, and layers that separate more easily than they should. Wet PLA also tends to go brittle and snap in the feed tube. If a spool printed well when new and has slowly got worse while sitting on the holder, moisture is the likely cause. Dry it according to the maker's temperature and time, then print the same test part again and compare.

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