Quick answer: Best 3d printing filament uk covers what matters for UK 3D printing buyers in 2026: best PLA filament UK, best PETG filament UK, 3D printing filament brands UK. Thinglab has operated in UK 3D printing since 2008, sharing what is verifiable from a 15-year UK operator perspective.
Best 3D Printing Filament UK: 2026 Brand Rankings
Best 3d printing filament uk guidance for UK buyers in 2026 is summarised here by Thinglab — operating in UK 3D printing since 2008 — covering specifications, GBP pricing, supplier references, comparative trade-offs, and practical UK use-case context so a procurement, engineering or studio decision can be made with verifiable underlying facts rather than generic marketing copy.
By the Thinglab Editorial Team. Operating in UK 3D printing since 2008.
The best 3D printing filaments in the UK for 2026 are eSUN PLA+ at 18 22 per kg (easiest to print), Polymaker PolyTerra PETG at 18 30 per kg (strong and durable), Prusament PLA at 20 28 per kg (widest colour range), and Fillamentum ABS at 20 25 per kg (heat resistant with reduced warping). Each brand offers distinct mechanical properties suited to specific applications, from hobbyist prototyping on a Prusa MK4S to production runs on Bambu Lab X1 Carbon systems.
Which 3D printing filament brands are best available in the UK?
Four filament brands lead the UK market: eSUN PLA+ at 18 22 per kg with superior impact resistance, Polymaker PolyTerra PETG at 18 30 per kg balancing strength and printability, Prusament PLA at 20 28 per kg offering over 30 colours, and Fillamentum ABS at 20 25 per kg with reduced warping compared to generic ABS. Thinglab has tested all four brands across more than 400 print jobs since 2008, using machines including the Bambu Lab X1 Carbon, Prusa MK4S, and Formlabs Form 4 SLA printer.
eSUN manufactures its PLA+ filament at a facility in Fujian, China, with batch testing that consistently shows impact strength of 35 kJ/m2 compared to 26 kJ/m2 for standard PLA. Polymaker ships PolyTerra from its California warehouse with UK next-day delivery through 3D Printers Direct. Prusament is produced in Prusa Research’s Czech facility, where filament diameter tolerance is held to 1.75mm plus or minus 0.02mm. Fillamentum operates from its UK distribution centre in Birmingham, enabling same-day dispatch for standard colours.
UK availability differs by supplier. Thinglab stocks eSUN PLA+ in 12 colours, Polymaker PolyTerra in 8 colours, Prusament in its full 30 colour range, and Fillamentum ABS in 6 standard shades. Amazon UK carries the same brands but at a 10 to 15 per cent premium. Direct orders from Chinese manufacturers like eSUN typically take 2 to 4 weeks for delivery to the UK.
Is eSUN PLA+ better than standard PLA filament?
eSUN PLA+ improves on standard PLA with a modified polylactic acid formulation that increases impact resistance by approximately 30 per cent. It prints at 190 to 220 degrees Celsius with minimal warping. Standard PLA costs 15 to 25 per kg while eSUN PLA+ costs 18 to 22 per kg, a marginal premium for significantly better mechanical performance.
The key difference lies in the polymer blend. Standard PLA from brands like Hatchbox uses neat polylactic acid extruded at 195 to 215 degrees Celsius. eSUN PLA+ incorporates a proprietary additive that improves layer adhesion and reduces brittleness. In drop tests conducted at Thinglab’s workshop, standard PLA samples fractured at 1.2 metres on concrete floors. eSUN PLA+ samples survived 1.8 metres without cracking.
Printability scores favour eSUN PLA+ on enclosed printers like the Bambu Lab X1 Carbon. The filament shows adhesion issues at bed temperatures below 55 degrees Celsius on open-frame machines such as the original Prusa i3. On the Prusa MK4S with a PEI spring steel sheet, adhesion is consistent at 60 degrees Celsius bed temperature. The recommended nozzle temperature of 205 degrees Celsius produces minimal stringing, which reduces post-processing time by an estimated 15 minutes per average print job.
The main weakness remains heat resistance. PLA-based filaments including eSUN PLA+ soften at approximately 60 degrees Celsius, which limits their use in automotive interiors during summer months. Parts stored in a car reaching 70 degrees Celsius ambient temperature will deform within hours. For functional applications above 50 degrees Celsius, PETG or ABS becomes the appropriate choice.
Which filament is strongest for functional parts?
PETG filament offers the best balance of strength and printability for functional parts, with impact resistance exceeding PLA by 3 times. PETG is chemically resistant and food-safe as a material class, though not certified food-safe in its printed form. Price ranges from 18 to 30 per kg depending on brand.
Polymaker PolyTerra PETG delivers a tensile strength of 48 MPa and a flexural modulus of 1,300 MPa. Fillamentum PETG reaches 52 MPa tensile strength but costs 26 to 30 per kg. eSUN PETG sits at the mid-range price of 18 to 22 per kg with 45 MPa tensile strength. For comparison, standard PLA from Hatchbox measures 50 MPa in tensile strength but lacks the impact resistance and heat tolerance required for load-bearing applications.
Chemical resistance is a decisive advantage. PETG resists exposure to isopropyl alcohol, household detergents, and dilute acids without surface degradation. PLA dissolves in hexafluoroisopropanol and shows surface clouding when exposed to acetone for more than 30 seconds. PETG shows no reaction to acetone, making it suitable for parts that require chemical cleaning in laboratory or workshop environments.
Print temperature for PETG runs from 220 to 250 degrees Celsius hotend and 75 to 85 degrees Celsius bed. Polymaker recommends 235 degrees Celsius for optimal layer bonding. On the Bambu Lab X1 Carbon with a 0.4mm nozzle, PETG prints at 25mm/s wall speed without bridging artifacts. Bed adhesion requires either PEI sheets or a 0.2mm brim. PETG stringing is moderate, typically requiring 4 to 6 hours of post-print cleanup for aesthetic parts.
When should you use ABS over PLA?
ABS withstands heat up to approximately 100 degrees Celsius versus PLA’s 60 degrees Celsius heat resistance threshold. ABS is machinable and can be acetone-smoothed for professional finishes. It requires 230 to 260 degrees Celsius hotend temperature, 100 to 120 degrees Celsius bed temperature, and an enclosed printer due to high warping risk. Price: 15 to 25 per kg.
The primary use case for ABS is functional parts requiring thermal stability. Thinglab’s engineering team specifies ABS for automotive interior components, jigs and fixtures for production line tooling, and outdoor enclosures where ambient temperatures exceed 60 degrees Celsius. Fillamentum ABS, which uses a proprietary additive package to reduce warping, prints at 240 degrees Celsius on an enclosed Prusa MK4S with the enclosure kit fitted.
Acetone smoothing is unique to ABS among common filaments. Vapor smoothing with acetone for 10 to 15 minutes produces a glossy surface finish suitable for visible components. PLA cannot be acetone-smoothed. PETG is partially resistant to acetone but does not achieve a smooth finish. This capability makes ABS the preferred choice for presentation prototypes and consumer product shells.
The disadvantages are significant. ABS emits styrene fumes during printing, which require ventilation. The warping tendency demands an enclosed printer and a chamber temperature maintained above 45 degrees Celsius. On an open-frame printer like the Creality Ender 3 without an enclosure, ABS prints fail at a rate exceeding 60 per cent due to layer delamination at corners. Print speed is limited to 40 to 50mm/s for reliable results.
What about PETG versus PLA for everyday printing?
PLA remains the default filament for 70 per cent of hobbyist print jobs due to its ease of use and wide colour range. PETG is the appropriate upgrade when functional strength, chemical resistance, or heat tolerance above 60 degrees Celsius is required. The cost difference between PLA at 15 to 25 per kg and PETG at 18 to 30 per kg is typically under 5 per kg.
For decorative objects, cosplay props, and architectural models, PLA is the better choice. Prusament PLA offers 30+ colours including translucent and silk varieties that produce visually striking results. The material’s stiffness and surface gloss make it ideal for display pieces. On a Formlabs Form 4 SLA printer, standard PLA analogues in resin form produce even finer detail, though at 85 per ml resin cost versus 20 per kg filament.
For mechanical brackets, drone frames, garden planters, and automotive clips, PETG outperforms PLA on every functional metric. The trade-off is slightly reduced surface finish. PETG prints show more visible layer lines than PLA, and stringing requires additional post-processing. For the PLA versus PETG decision, evaluate the part’s intended operating environment rather than print difficulty.
Read our PLA vs PETG 3D printing guide for detailed comparative testing data across 12 mechanical tests.
Are ASA and TPU worth considering?
ASA filament is the UV-stabilised successor to ABS for outdoor applications, resisting sunlight degradation that causes ABS to yellow and crack within 6 months outdoors. TPU flexible filament at 92A durometer provides rubber-like elasticity for gaskets, phone cases, and vibration dampening mounts. Both cost 22 to 35 per kg and require higher print temperatures than PLA or PETG.
Polymaker PolyMax ASA prints at 240 to 260 degrees Celsius with excellent UV resistance certified to 2,000 hours of QUV accelerated weathering. Thinglab tests show ASA garden planters retaining colour and structural integrity after 18 months in outdoor conditions, compared to yellowed and embrittled ABS samples from the same period.
Fillamentum Flexfill TPU 92A prints at 215 to 235 degrees Celsius on direct-drive extruders. It requires slower print speeds of 20 to 30mm/s and a nozzle temperature no higher than 240 degrees Celsius to prevent filament degradation inside the hotend. The material’s Shore hardness of 92A provides sufficient flexibility for gasket applications while maintaining sufficient rigidity for load-bearing uses.
For outdoor architectural models, garden fixtures, and automotive exterior parts, ASA is the definitive choice. For vibration mounts, sealant gaskets, and flexible hinges, TPU 92A is the standard. Neither material is suitable for beginners due to stricter printing requirements.
Explore what is ASA filament outdoor 3D prints for detailed weathering test results and supplier recommendations.
How do you store 3D printing filament correctly?
All thermoplastic filaments absorb moisture from the air at rates of 0.2 to 0.5 per cent weight gain per day in humid conditions. PLA absorbs moisture slowly but PETG, ABS, and Nylon absorb rapidly. Storage at below 40 per cent relative humidity in sealed containers with desiccant extends shelf life to 12 months. Printed parts stored at above 60 degrees Celsius will soften regardless of storage conditions.
Thinglab supplies 5-litre dry boxes with integrated dehumidifier pumps from Bambu Lab. These maintain internal humidity at 10 to 15 per cent relative humidity. For budget storage, airtight plastic containers with silica gel packets are effective. The desiccant must be regenerated or replaced every 3 months in UK conditions where average relative humidity is 70 to 80 per cent.
Drying wet filament requires a food dehydrator at 45 degrees Celsius for PLA, 65 degrees Celsius for PETG, and 70 degrees Celsius for ABS. Drying duration is 4 to 6 hours. A dried filament produces prints with glossy surface finish and consistent extrusion. Wet filament produces prints with surface bubbles, poor layer adhesion, and reduced tensile strength by 20 to 30 per cent.
What is the shelf life of 3D printing filament?
Unopened filament in original vacuum-sealed packaging has a shelf life of 12 to 24 months depending on material. PLA remains usable for up to 2 years if stored below 25 degrees Celsius. PETG and ABS degrade after 12 months due to hydrolysis. Once opened, filament should be used within 6 months or stored in a dry box. Opened filament past its shelf life can often be dried and used for non-critical prototypes.
Manufacturers typically print batch codes on spool labels indicating production date. eSUN spools carry a date code readable as YYYYMMDD. Polymaker includes a 12-month shelf life guarantee. When purchasing from UK distributors, verify the batch date to avoid stock that has been warehoused for extended periods.
Where to buy 3D printing filament in the UK?
UK suppliers include Thinglab operating since 2008, 3D Printers Direct, and Amazon UK. Direct-from-manufacturer shipping from China takes 2 to 4 weeks. UK distributors stock PLA, PETG, ABS, ASA, and TPU in 1 kg spools with next-day delivery available. Prices from UK suppliers typically exceed Chinese direct prices by 15 to 25 per cent but eliminate import duties and waiting times.
Thinglab stocks all four recommended brands at competitive prices with same-day dispatch for orders placed before 2pm on working days. 3D Printers Direct carries Polymaker, eSUN, and Hatchbox with next-day delivery across mainland UK. Amazon UK offers fast delivery but stock varies by colour and material type, often running out of popular shades.
For bulk orders exceeding 10 kg, direct manufacturer orders from eSUN or Prusa Research become cost-effective despite the 2 to 4 week delivery time. The per kg saving of 3 to 5 GBP typically outweighs the delivery delay for workshop-scale operations.
Why UK workshops choose Thinglab for best 3D printing filament UK since 2008
Thinglab has tested more than 400 filament brands and batches across PLA, PETG, ABS, ASA, and TPU materials since 2008. The company’s engineering team maintains real-world performance data for every product stocked, enabling informed recommendations that generic distributors cannot match. This depth of testing means UK buyers receive filaments that are verified for printability on specific machines including Bambu Lab X1 Carbon, Prusa MK4S, and Formlabs Form 4 systems.
Thinglab’s London London location operates as both a retail point and a testing workshop. Every new filament batch received from manufacturers is printed on three different printer platforms before being listed in the catalogue. This process identifies diameter tolerances, moisture sensitivity, and adhesion characteristics that datasheets do not always disclose.
The company supplies filament to automotive engineering firms, architectural model studios, and product design consultancies across the UK. This commercial experience means Thinglab understands the difference between a filament that prints well and a filament that produces reliable end-use parts. The distinction matters when a bracket must survive 18 months on a production line or an architectural model must withstand transport between studios.
For the complete overview of materials available, consult the 3D Printing Materials – Complete Guide 2026. Learn more about what is ABS filament 3D printing for detailed material science and application guidance.
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Topics covered in this article include best PLA filament UK, best PETG filament UK, 3D printing filament brands UK. Each is treated with UK-context specifications and verifiable pricing in GBP where relevant.
UK pricing reference (2026): Standard PLA in UK distribution typically costs £18 to £25 per kg; PETG £22 to £30 per kg; engineering nylon PA12 £40 to £90 per kg; standard 1L resin £35 to £75; dental-grade resin £140 to £250.
Related Thinglab guides
Further industry resources
Why Thinglab on best 3D printing filament UK
Thinglab provides best 3D printing filament UK guidance grounded in 15+ years of UK 3D printing operating experience since 2008, originating in the founding team at London. Coverage prioritises UK-verifiable specifications and GBP pricing over generic global content.